OFFSET
1,2
LINKS
Vaclav Kotesovec, Table of n, a(n) for n = 1..300
FORMULA
a(n) ~ (-1)^n * c * (30/log(6))^n * n! / n^(2/3 + 3*log(6)/5), where c = 0.03826354730535151243617...
PROG
(PARI) {a(n) = my(A=x, V=[1, 5]); for(i=1, n, V = concat(V, 0); A=x*Ser(V); V[#V] = Vec( subst(A, x, 7*x - 6*A) )[#V]/5 ); V[n]}
for(n=1, 30, print1(a(n), ", "))
CROSSREFS
KEYWORD
sign
AUTHOR
Vaclav Kotesovec, Oct 09 2017
STATUS
approved