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Search: id:A119412
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| A119412 |
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Sum((binomial(2,3*j)+n),j=12..n). |
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+0
2
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| 0, 12, 26, 42, 60, 80, 102, 126, 152, 180, 210, 242, 276, 312, 350, 390, 432, 476, 522, 570, 620, 672, 726, 782, 840, 900, 962, 1026, 1092, 1160, 1230, 1302, 1376, 1452, 1530, 1610, 1692, 1776, 1862, 1950, 2040, 2132, 2226, 2322, 2420, 2520
(list; graph; listen)
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OFFSET
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11,2
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FORMULA
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Equals 2*A056115 - Zerinvary Lajos (zerinvarylajos(AT)yahoo.com), Feb 12 2007
a(n)=n*((n+3)*5-(n+1)*4), n>=0 . - Zerinvary Lajos (zerinvarylajos(AT)yahoo.com), Mar 06 2007
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MAPLE
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a:=n->sum((binomial(2, 3*j)+n), j=12..n): seq(a(n), n=11..56);
a:=n->sum(n, j=12..n): seq(a(n), n=11..56); - Zerinvary Lajos (zerinvarylajos(AT)yahoo.com), Feb 12 2007
seq(n*((n+3)*5-(n+1)*4), n=0..45); - Zerinvary Lajos (zerinvarylajos(AT)yahoo.com), Mar 06 2007
seq(GAMMA(n+7)/GAMMA(n+5)-30, n=0..45); - Zerinvary Lajos (zerinvarylajos(AT)yahoo.com), Apr 23 2007
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CROSSREFS
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Cf. A063930.
Adjacent sequences: A119409 A119410 A119411 this_sequence A119413 A119414 A119415
Sequence in context: A025138 A075689 A054303 this_sequence A105814 A030736 A003346
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KEYWORD
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easy,nonn
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AUTHOR
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Zerinvary Lajos (zerinvarylajos(AT)yahoo.com), Jul 26 2006
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