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Search: id:A062809
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| A062809 |
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Sum (n - i)^(1 + i), i = 1..n. |
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+0
1
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| 0, 1, 5, 18, 60, 203, 725, 2772, 11368, 49853, 232757, 1151902, 6018772, 33087191, 190780197, 1150653904, 7241710912, 47454745785, 323154696165, 2282779990474, 16700904488684, 126356632390275, 987303454928949
(list; graph; listen)
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OFFSET
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1,3
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MAPLE
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a:=n->sum((n-j)^j, j=2..n): seq(a(n), n=2..24); - Zerinvary Lajos (zerinvarylajos(AT)yahoo.com), Jun 07 2008
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MATHEMATICA
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Sum[(n - i)^(1 + i), {i, 1, n}]
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CROSSREFS
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Sequence in context: A133648 A099449 A104630 this_sequence A122234 A113301 A111567
Adjacent sequences: A062806 A062807 A062808 this_sequence A062810 A062811 A062812
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KEYWORD
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nonn,easy
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AUTHOR
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Olivier Gerard (olivier.gerard(AT)gmail.com), Jun 23 2001
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