A384975 G.f. A(x) satisfies A(x) = 1 + x*A(x)/A(-x*A(x)^5)^3.
1, 1, 4, 16, 77, 303, 718, -4934, -108553, -1275290, -12473324, -107472840, -826679323, -5418440094, -24911021972, 28733788740, 2764189150143, 48003187278203, 629585195050804, 7164019744705726, 73396269512625553, 677866973062726837, 5460528984809591552
Offset: 0
Keywords
Crossrefs
Column k=1 of A384978.
Programs
-
PARI
a(n, k=-1) = if(n*k==0, 0^n, (-1)^n*k*sum(j=1, n, binomial(-5*n+5*j+k-1, j-1)*a(n-j, 3*j)/j));
Formula
See A384978.