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A144560
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Ten times hexagonal numbers: 10*n*(2*n-1).
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0
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0, 10, 60, 150, 280, 450, 660, 910, 1200, 1530, 1900, 2310, 2760, 3250, 3780, 4350, 4960, 5610, 6300, 7030, 7800, 8610, 9460, 10350, 11280, 12250, 13260, 14310, 15400, 16530, 17700, 18910, 20160, 21450, 22780, 24150, 25560, 27010
(list; graph; refs; listen; history; internal format)
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OFFSET
| 0,2
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COMMENTS
| Sequence found by reading the line from 0, in the direction 0, 10,..., in the square spiral whose vertices are the generalized dodecagonal numbers A195162. - Omar E. Pol, Sep 18 2011
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FORMULA
| a(n) = 20n^2 - 10n = A000384(n)*10 = A002939(n)*5 = A152745(n)*2.
a(n) = a(n-1)+40*n-30 (with a(0)=0) [From Vincenzo Librandi, Dec 14 2010]
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CROSSREFS
| Cf. A000384, A002939, A152745, A152994.
Sequence in context: A066290 A065641 A121874 * A076160 A004406 A003472
Adjacent sequences: A144557 A144558 A144559 * A144561 A144562 A144563
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KEYWORD
| easy,nonn
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AUTHOR
| Omar E. Pol (info(AT)polprimos.com), Jan 01 2009
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