login
A090361
Satisfies A^2 = BINOMIAL(A090358^3), where A090358^6 = BINOMIAL(A090358^5).
2
1, 2, 12, 130, 2075, 44196, 1183492, 38254712, 1449394470, 62974889140, 3085705347128, 168283580164356, 10107641429213386, 662869582493716400, 47124829795282593000, 3609674673146922124600, 296355186635275737517175
OFFSET
0,2
COMMENTS
See comments in A090358.
LINKS
FORMULA
a(n) ~ (n-1)! / (50/3 * (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^3, x, x/(1-x))/(1-x)+x*O(x^n); polcoeff(B^(1/2), n, x))}
CROSSREFS
Cf. A090358.
Sequence in context: A214759 A365601 A185751 * A377360 A258467 A286422
KEYWORD
nonn
AUTHOR
Paul D. Hanna, Nov 26 2003
STATUS
approved