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A081282 Generalized centered polygonal numbers. 2
0, 1, 6, 22, 62, 147, 308, 588, 1044, 1749, 2794, 4290, 6370, 9191, 12936, 17816, 24072, 31977, 41838, 53998, 68838, 86779, 108284, 133860, 164060, 199485, 240786, 288666, 343882, 407247, 479632, 561968, 655248, 760529, 878934, 1011654 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,3

COMMENTS

Partial sums of A006007.

LINKS

Table of n, a(n) for n=0..35.

FORMULA

a(n) = 2C(n+3, 5)+C(n+2, 3). G.f.: x(1+x^2)/(1-x)^6.

a(n) = (n*(n+1)*(n+2)*(n^2+2*n+7))/60. - Carl Najafi, Nov 18 2012.

CROSSREFS

Cf. A081284.

Sequence in context: A071239 A105450 A011888 * A001769 A166020 A120477

Adjacent sequences:  A081279 A081280 A081281 * A081283 A081284 A081285

KEYWORD

easy,nonn

AUTHOR

Paul Barry, Mar 17 2003

STATUS

approved

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Last modified May 19 07:18 EDT 2013. Contains 225429 sequences.