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A011888
Partial sums of A011863.
1
0, 1, 6, 22, 61, 142, 292, 548, 958, 1583, 2498, 3794, 5579, 7980, 11144, 15240, 20460, 27021, 35166, 45166, 57321, 71962, 89452, 110188, 134602, 163163, 196378, 234794, 278999, 329624, 387344, 452880
OFFSET
0,3
FORMULA
From R. J. Mathar, Mar 24 2011: (Start)
a(n) = (2*n+3)*(6*n^4+36*n^3+76*n^2+66*n+5)/960-(-1)^n/64.
G.f.: x*(1+x+x^2) / ( (1+x)*(x-1)^6 ). (End)
CROSSREFS
Cf. A011863.
Sequence in context: A066188 A071239 A105450 * A081282 A001769 A166020
KEYWORD
nonn,easy
AUTHOR
STATUS
approved