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#26 by Michael De Vlieger at Tue Mar 05 16:32:52 EST 2024
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#25 by Peter Munn at Tue Mar 05 15:56:32 EST 2024
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#24 by Peter Munn at Tue Mar 05 15:53:55 EST 2024
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| FORMULA
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For k >= 1, i = A352909(k,1), j = A352909(k,2), A(i,j) = i + j. - Peter Munn, Mar 04 2024
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| CROSSREFS
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Cf. A000695, A054239, A057300, A062880, A352909. (pairs (i,j) such that A(i,j) = i+j).
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Discussion
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| Tue Mar 05
| 15:56
| Peter Munn: Essentially, my intent is to flag and explain the relationship between the 2 sequences, and on reflection this is possibly best done purely in the xref section.
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#23 by Peter Munn at Mon Mar 04 03:02:57 EST 2024
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| FORMULA
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For k >= 1, i = A352909(k,1), j = A352909(k,2), A(i,j) = i + j. - Peter Munn, Mar 04 2024
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| CROSSREFS
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Cf. A000695, A054239, A057300, A062880, A352909.
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| STATUS
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approved
editing
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#22 by N. J. A. Sloane at Sat Dec 21 14:33:52 EST 2019
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#21 by Michel Marcus at Fri Dec 13 00:30:26 EST 2019
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Discussion
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| Fri Dec 13
| 08:10
| Peter Munn: Keyword base looks entirely sensible. As for "A" v "T" ...
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| 08:11
| Peter Munn: I had in my head that T was for triangles and A for square arrays; but my confusion seems not without cause. The style sheet is silent on this, but
https://oeis.org/eishelp2.html (the destination of the "Format" link at the bottom of the OEIS page) says "The typical term in these arrays is usually denoted by T(n,k) (or sometimes A(n,k))." Looking specifically for square arrays I have just searched OEIS for [keyword:tabl antidiagonal -triangle] and the first 3 pages are a mix, with A(n,k) slightly more common T(n,k).
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| 08:12
| Peter Munn: I remember researching this 3 years ago before my earliest authored sequences (3 of 4 were square arrays) and have found some notes. I obviously didn't come to clear conclusion at that time as my first submission used T and my next pair used A.
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| 08:18
| Peter Munn: The best consistency that can be achieved easily seems to be that a sequence is self-consistent. I seem to have been more nearly correct in this case, as the published example reads "a(3,1)=6 ..."
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| 11:36
| Peter Munn: I haven't always managed this. There are sequences I have edited this year where I have unintentionally made the sequence inconsistent in respect of A(n,k) v T(n,k); and it was worth reminding me to be aware of the issue.
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#20 by Michel Marcus at Fri Dec 13 00:29:52 EST 2019
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| KEYWORD
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easy,nonn,base,tabl,easy,look,changed
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Discussion
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| Fri Dec 13
| 00:30
| Michel Marcus: kwd base, ok ?
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| 00:30
| Michel Marcus: rather use T(x,y) than A(x,y) ?
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#19 by Michel Marcus at Fri Dec 13 00:29:05 EST 2019
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| EXAMPLE
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aT(3,1)=6 because (0*2 + 1*sqrt(2) + 1*1) + (0*2 + 0*sqrt(2) + 1*1) = (1*2 + 1*sqrt(2) + 0*1) (i.e., base sqrt(2) addition).
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| STATUS
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proposed
editing
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#18 by Jon E. Schoenfield at Thu Dec 12 23:47:49 EST 2019
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#17 by Jon E. Schoenfield at Thu Dec 12 23:47:46 EST 2019
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| EXAMPLE
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a(3,1)=6 because (0*2+ + 1*sqrt(2)+) + 1*1) + (0*2+ + 0*sqrt(2)+) + 1*1) = (1*2+ + 1*sqrt(2)+) + 0*1) (i.e. ., base sqrt(2) addition)).
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| STATUS
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proposed
editing
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