Revision History for A278330
(Underlined text is an addition;
strikethrough text is a deletion.)
Showing entries 1-10
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#12 by Alois P. Heinz at Mon Feb 06 12:28:12 EST 2017
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#11 by Alois P. Heinz at Mon Feb 06 12:28:07 EST 2017
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| LINKS
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Wikipedia, <a href="httphttps://en.wikipedia.org/wiki/Pentomino">Pentomino</a>
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| STATUS
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approved
editing
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#10 by Alois P. Heinz at Thu Nov 24 07:14:25 EST 2016
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#9 by Alois P. Heinz at Wed Nov 23 11:19:18 EST 2016
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| FORMULA
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a(n) mod 2 = A079978(n).
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| CROSSREFS
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Cf. A079978, A174249, A233427, A234312, A234931, A247124, A247268, A247443, A249762, A264765, A264812.
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#8 by Alois P. Heinz at Wed Nov 23 11:09:13 EST 2016
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| FORMULA
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G.f.: -(4*x^6+x^3-1) / (8*x^12+ +16*x^11+ +6*x^9+ +4*x^8+ +8*x^7- -21*x^6- -4*x^5 -8*x^4 -2*x^3 -2*x^2+1).
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#7 by Alois P. Heinz at Wed Nov 23 11:06:59 EST 2016
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| MAPLE
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a:= n-> (Matrix(12, (i, j)-> `if`(i+1=j, 1, `if`(i=12,
[-8, -16, 0, -6, -4, -8, 21, 4, 8, 2, 2, 0][j], 0)))^n.
<<1, 0, 2, 1, 12, 10, 59, 52, 276, 349, 1404, 1984>>)[1, 1]:
seq(a(n), n=0..35);
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#6 by Alois P. Heinz at Fri Nov 18 12:27:37 EST 2016
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| LINKS
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<a href="/index/Rec#order_12">Index entries for linear recurrences with constant coefficients</a>, signature (0,2,2,8,4,21,-8,-4,-6,0,-16,-8).
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#5 by Alois P. Heinz at Fri Nov 18 12:24:14 EST 2016
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| LINKS
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Alois P. Heinz, <a href="/A278330/b278330.txt">Table of n, a(n) for n = 0..1000</a>
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| KEYWORD
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nonn,easy,changed
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#4 by Alois P. Heinz at Fri Nov 18 12:11:27 EST 2016
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#3 by Alois P. Heinz at Fri Nov 18 12:08:57 EST 2016
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| EXAMPLE
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a(2) = 2, a(3) = 1:
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|___| |___| |_____| .
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