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Search: id:A019583
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| 0, 0, 1, 24, 162, 640, 1875, 4536, 9604, 18432, 32805, 55000, 87846, 134784, 199927, 288120, 405000, 557056, 751689, 997272, 1303210, 1680000, 2139291, 2693944, 3358092, 4147200, 5078125, 6169176
(list; graph; listen)
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OFFSET
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0,4
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COMMENT
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a(n)=n(n-1)^4/2 is half the number of colorings of 5 points on a line with n colors. - Ron Hardin (rhh(AT)cadence.com), Feb 23 2002
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MAPLE
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with(combinat):a:=n->sum(sum(sum(binomial(n+2, 2), j=0..n), k=0..n), m=0..n): seq(a(n), n=-2..25); - Zerinvary Lajos (zerinvarylajos(AT)yahoo.com), May 30 2007
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CROSSREFS
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Adjacent sequences: A019580 A019581 A019582 this_sequence A019584 A019585 A019586
Sequence in context: A125334 A126492 A136380 this_sequence A087887 A052761 A073993
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KEYWORD
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nonn
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AUTHOR
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njas
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Search completed in 0.002 seconds
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