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Search: id:A140680
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| 0, 19, 44, 75, 112, 155, 204, 259, 320, 387, 460, 539, 624, 715, 812, 915, 1024, 1139, 1260, 1387, 1520, 1659, 1804, 1955, 2112, 2275, 2444, 2619, 2800, 2987, 3180, 3379, 3584, 3795, 4012, 4235, 4464, 4699, 4940, 5187, 5440, 5699
(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)=3*n^2 + 16*n.
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MATHEMATICA
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a[n_]:=Sum[6*i+13, {i, 1, n}]; [From Vladimir Orlovsky (4vladimir(AT)gmail.com), Dec 04 2008]
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CROSSREFS
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Cf. A033428, A045944, A140676, A067725, A140677, A140678, A067707, A140679, A140681, A140689.
Sequence in context: A063313 A044096 A044477 this_sequence A115249 A135029 A166148
Adjacent sequences: A140677 A140678 A140679 this_sequence A140681 A140682 A140683
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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), May 22 2008
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