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Search: id:A132765
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| 0, 24, 50, 78, 108, 140, 174, 210, 248, 288, 330, 374, 420, 468, 518, 570, 624, 680, 738, 798, 860, 924, 990, 1058, 1128, 1200, 1274, 1350, 1428, 1508, 1590, 1674, 1760, 1848, 1938, 2030, 2124, 2220, 2318, 2418, 2520, 2624, 2730, 2838
(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).
a(n)=2*n+a(n-1)+20 (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+20=24; n=3, a(3)=2*3+24+20=50; n=4, a(4)=2*4+50+20=78 [From Vincenzo Librandi (vincenzo.librandi(AT)tin.it), Nov 08 2009]
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MAPLE
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seq(sum(4*k-n, k=8..n), n=7..50); - 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, 24, 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, A132760, A132761.
Cf. A132760, A132761, A132762, A132763, A132764, A098849, A098850, A005563, A028552, A028347, A028557, A028560, A028563, A028566, A028569, A098603, A098847, A132759, A098848, A120071 [From Vladimir Orlovsky (4vladimir(AT)gmail.com), Feb 26 2009]
Sequence in context: A042148 A042150 A087355 this_sequence A025137 A070197 A084586
Adjacent sequences: A132762 A132763 A132764 this_sequence A132766 A132767 A132768
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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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