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Search: id:A132760
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| 0, 16, 34, 54, 76, 100, 126, 154, 184, 216, 250, 286, 324, 364, 406, 450, 496, 544, 594, 646, 700, 756, 814, 874, 936, 1000, 1066, 1134, 1204, 1276, 1350, 1426, 1504, 1584, 1666, 1750, 1836, 1924, 2014, 2106, 2200, 2296, 2394, 2494
(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 + 15).
a(n)=2*n+a(n-1)+12 (with a(1)=0) [From Vincenzo Librandi (vincenzo.librandi(AT)tin.it), Nov 08 2009]
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EXAMPLE
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For n=2, a(2)=2*2+0+12=16; n=3, a(3)=2*3+16+12=34; n=4, a(4)=2*4+34+12=54 [From Vincenzo Librandi (vincenzo.librandi(AT)tin.it), Nov 08 2009]
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MAPLE
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a:=n->sum(n, j=16..n): seq(a(n), n=15..58); - Zerinvary Lajos (zerinvarylajos(AT)yahoo.com), Feb 17 2008
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MATHEMATICA
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s=0; lst={}; Do[s+=n; AppendTo[lst, s], {n, 16, 6!, 2}]; lst [From Vladimir Orlovsky (4vladimir(AT)gmail.com), Feb 26 2009]
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CROSSREFS
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Cf. A002378, A120071.
Cf. A001477, A056126, A098849, A120071, A132761, A132765.
a(n)=2*A056121(n). [From Reinhard Zumkeller (reinhard.zumkeller(AT)gmail.com), Mar 20 2009]
Sequence in context: A070590 A132370 A091216 this_sequence A153819 A070589 A104910
Adjacent sequences: A132757 A132758 A132759 this_sequence A132761 A132762 A132763
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KEYWORD
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easy,nonn,new
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AUTHOR
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Omar E. Pol (info(AT)polprimos.com), Aug 28 2007
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