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A154617
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Eleven times hexagonal numbers: 11*n*(2*n-1).
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3
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0, 11, 66, 165, 308, 495, 726, 1001, 1320, 1683, 2090, 2541, 3036, 3575, 4158, 4785, 5456, 6171, 6930, 7733, 8580, 9471, 10406, 11385, 12408, 13475, 14586, 15741, 16940, 18183, 19470, 20801, 22176, 23595, 25058, 26565, 28116, 29711
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OFFSET
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0,2
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COMMENTS
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Sequence found by reading the line from 0, in the direction 0, 11,..., in the square spiral whose vertices are the generalized tridecagonal numbers A195313. - Omar E. Pol, Sep 18 2011
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LINKS
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FORMULA
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a(n) = 22*n^2 - 11*n = A000384(n)*11.
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PROG
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CROSSREFS
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KEYWORD
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easy,nonn
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AUTHOR
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STATUS
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approved
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