Revision History for A066723
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strikethrough text is a deletion.)
Showing entries 1-10
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| A066723
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Number of distinct partitions of n-th triangular number which can be obtained by merging parts in the partition 1+2+...+n.
(history;
published version)
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#15 by Michel Marcus at Sat Nov 04 02:48:18 EDT 2023
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#14 by Stefano Spezia at Sat Nov 04 02:07:55 EDT 2023
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#13 by Sean A. Irvine at Fri Nov 03 19:25:25 EDT 2023
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#12 by Sean A. Irvine at Fri Nov 03 19:25:21 EDT 2023
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| DATA
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1, 1, 2, 5, 13, 36, 109, 340, 1116, 3744, 12981, 45722, 165247, 603242, 2242932, 8422438, 32040585, 122800802, 475937009
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| EXTENSIONS
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a(16)-a(18) from Sean A. Irvine, Nov 03 2023
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| STATUS
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approved
editing
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#11 by N. J. A. Sloane at Tue Jun 24 01:08:19 EDT 2014
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| EXTENSIONS
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Edited by _Dean Hickerson (dean.hickerson(AT)yahoo.com), _, Jan 18 2002
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Discussion
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| Tue Jun 24
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| OEIS Server: https://oeis.org/edit/global/2238
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#10 by Alois P. Heinz at Fri May 31 08:43:23 EDT 2013
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#9 by Alois P. Heinz at Fri May 31 08:42:18 EDT 2013
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#8 by Alois P. Heinz at Fri May 31 08:41:02 EDT 2013
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| MAPLE
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b:= proc(n) b(n):= `if`(n<2, {[1$n]}, map(x-> [sort([x[], n]),
seq(sort(subsop(i=x[i]+n, x)), i=1..nops(x))][], b(n-1)))
end:
a:= n-> nops(b(n)):
seq(a(n), n=0..10); # Alois P. Heinz, May 31 2013
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| EXTENSIONS
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a(15) from Alois P. Heinz, May 31 2013
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#7 by Alois P. Heinz at Fri May 31 08:37:20 EDT 2013
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| DATA
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1, 1, 2, 5, 13, 36, 109, 340, 1116, 3744, 12981, 45722, 165247, 603242, 2242932, 8422438
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| STATUS
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approved
editing
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#6 by Russ Cox at Sat Mar 31 13:50:43 EDT 2012
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| AUTHOR
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_Naohiro Nomoto (n_nomoto(AT)yabumi.com), _, Jan 15 2002
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Discussion
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| Sat Mar 31
| 13:50
| OEIS Server: https://oeis.org/edit/global/907
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