OFFSET
1,1
FORMULA
From R. J. Mathar, Sep 15 2009: (Start)
a(n) = n*(2*n+3)*(n+2)*(n+1)*(4*n^2+8*n-3)/6.
G.f.: (27*x^3+391*x^2+497*x+45)*x/(1-x)^7. (End)
MAPLE
S := proc(n, L) mul(x+i, i=L) ; expand(%) ; coeftayl(%, x=0, nops(L)-n) ; end: A024379 := proc(n) S(3, [seq(4*j+1, j=0..n+1)]) ; end: seq(A024379(n), n=1..40) ; # R. J. Mathar, Sep 15 2009
CROSSREFS
KEYWORD
nonn
AUTHOR
STATUS
approved