A011888 Partial sums of A011863.
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
Links
- Index entries for linear recurrences with constant coefficients, signature (5,-9,5,5,-9,5,-1).
Crossrefs
Cf. A011863.
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)