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A171211
G.f. satisfies: A(x) = (1 + x*A(2x))^8.
11
1, 8, 156, 5944, 425286, 57811000, 15246040860, 7918843018760, 8165859019876353, 16781575370067304448, 68855523432488884833408, 564547878300963670909315840, 9253510119618208634494942344960
OFFSET
0,2
FORMULA
Self-convolution 8th power of A171210 where a(n) = A171210(n+1)/2^n for n>=0.
MATHEMATICA
m = 13; A[_] = 0; Do[A[x_] = (1 + x A[2 x])^8 + O[x]^m // Normal, {m}];
CoefficientList[A[x], x] (* Jean-François Alcover, Nov 07 2019 *)
PROG
(PARI) {a(n)=local(A=1+x+x*O(x^n)); for(i=0, n, A=(1+x*subst(A, x, 2*x))^8); polcoeff(A, n)}
CROSSREFS
KEYWORD
nonn
AUTHOR
Paul D. Hanna, Dec 05 2009
STATUS
approved