A088704 a(n) equals the coefficient of x^n in f(x)^n where f(x)=1+sum(n>=0,x^(2^n)).

1, 1, 3, 7, 23, 71, 231, 743, 2431, 7999, 26563, 88683, 297551, 1002015, 3385175, 11466887, 38933183, 132454719, 451423203, 1540920939, 5267257103, 18027478847, 61770328227, 211872505243, 727411948351, 2499560376671

Offset: 0

Author

Paul D. Hanna, Oct 10 2003

Keywords

• nonn

Crossrefs

Cf. A075864.

Formula

G.f.: A(x) = 1 + x*d/dx[log(g(x))], where g(x)=sum(n>=0, A075864(n)*x^n) and g(x)=f(x*g(x)), given f(x)=1+sum(n>=0, x^(2^n)).