OFFSET
0,3
COMMENTS
See comments in A090358.
LINKS
Vaclav Kotesovec, Table of n, a(n) for n = 0..310
FORMULA
a(n) ~ (n-1)! / (75/2 * (log(6/5))^(n+1)). - Vaclav Kotesovec, Nov 19 2014
PROG
(PARI) {a(n)=local(A); if(n<1, 0, A=1+x+x*O(x^n); for(k=1, n, B=subst(A^5, x, x/(1-x))/(1-x)+x*O(x^n); A=A-A^6+B); B=subst(A^2, x, x/(1-x))/(1-x)+x*O(x^n); polcoeff(B^(1/3), n, x))}
CROSSREFS
KEYWORD
nonn
AUTHOR
Paul D. Hanna, Nov 26 2003
STATUS
approved