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A152750
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Eight times hexagonal numbers: 8*n*(2*n-1).
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3
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0, 8, 48, 120, 224, 360, 528, 728, 960, 1224, 1520, 1848, 2208, 2600, 3024, 3480, 3968, 4488, 5040, 5624, 6240, 6888, 7568, 8280, 9024, 9800, 10608, 11448, 12320, 13224, 14160, 15128, 16128, 17160, 18224, 19320, 20448, 21608, 22800, 24024
(list; graph; refs; listen; history; internal format)
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OFFSET
| 0,2
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COMMENTS
| Equals Engel expansion of cosh(1/2), except first member (see A067239).
Also sequence found by reading the line from 0, in the direction 0, 8,..., in the square spiral whose vertices are the generalized decagonal numbers A074377. - Omar E. Pol, Sep 18 2011
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FORMULA
| a(n) = 16n^2 - 8n = A000384(n)*8 = A002939(n)*4 = A085250(n)*2.
a(n) = A067239(n), for n>0.
a(n)=a(n-1)+32*n-24 (with a(0)=0) [From Vincenzo Librandi, Nov 26 2010]
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CROSSREFS
| Cf. A000384, A002939, A067239, A085250.
Sequence in context: A121028 A139279 A067239 * A121355 A168012 A035471
Adjacent sequences: A152747 A152748 A152749 * A152751 A152752 A152753
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KEYWORD
| easy,nonn
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AUTHOR
| Omar E. Pol (info(AT)polprimos.com), Dec 12 2008
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