OFFSET
0,3
EXAMPLE
G.f.: A(x) = 1 + x + 3*x^2 + 7*x^3 + 19*x^4 + 39*x^5 + 169*x^6 +...
log(A(x)) = (1+2*x)*x + (1+4*x)^2*x^2/2 + (1+2*x)^3*x^3/3 + (1+8*x)^4*x^4/4 +...
PROG
(PARI) {a(n)=polcoeff(exp(sum(m=1, n+1, (1+2^valuation(2*m, 2)*x+x*O(x^n))^m*x^m/m)), n)}
CROSSREFS
KEYWORD
nonn
AUTHOR
Paul D. Hanna, Jul 31 2009
STATUS
approved