OFFSET
0,2
EXAMPLE
G.f.: A(x) = 1 + 12*x + 165*x^2 + 1820*x^3 + 19610*x^4 + 190006*x^5 +...
log(A(x)) = 12*x + 186*x^2/2 + 1248*x^3/3 + 10934*x^4/4 + 39062*x^5/5 + 468744*x^6/6 +...+ 2*sigma(n*5^n)*x^n/n +...
PROG
(PARI) {a(n)=polcoeff(exp(sum(m=1, n, 2*sigma(m*5^m)*x^m/m)+x*O(x^n)), n)}
CROSSREFS
KEYWORD
nonn
AUTHOR
Paul D. Hanna, Jul 15 2011
STATUS
approved