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Search: id:A132754
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| 0, 12, 25, 39, 54, 70, 87, 105, 124, 144, 165, 187, 210, 234, 259, 285, 312, 340, 369, 399, 430, 462, 495, 529, 564, 600, 637, 675, 714, 754, 795, 837, 880, 924, 969, 1015, 1062, 1110, 1159, 1209, 1260, 1312, 1365, 1419, 1474, 1530
(list; graph; listen)
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OFFSET
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0,2
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FORMULA
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a(n) = n*(n+23)/2.
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MAPLE
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seq(sum(3*k-n, k=6..n), n=5..50); - Zerinvary Lajos (zerinvarylajos(AT)yahoo.com), Feb 15 2008
a:=n->sum(denom (k/(k+3)), k=9..n): seq(a(n), n=8..53); - Zerinvary Lajos (zerinvarylajos(AT)yahoo.com), May 31 2008
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CROSSREFS
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Cf. A000217, A056126.
Sequence in context: A033165 A042851 A041280 this_sequence A058848 A042869 A041282
Adjacent sequences: A132751 A132752 A132753 this_sequence A132755 A132756 A132757
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KEYWORD
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easy,nonn
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AUTHOR
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Omar E. Pol (info(AT)polprimos.com), Aug 28 2007
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