OFFSET
0,3
LINKS
Vaclav Kotesovec, Table of n, a(n) for n = 0..220
EXAMPLE
E.g.f.: A(x) = 1 + x^2/2! + 13*x^4/4! + 541*x^6/6! + 32761*x^8/8! +...
where
A(x) = cosh(x)*cosh(x^2)*cosh(x^3)*cosh(x^4)*cosh(x^5)*cosh(x^6)*...
PROG
(PARI) {a(n)=(2*n)!*polcoeff(prod(m=1, n, cosh(x^m +x*O(x^(2*n)))), 2*n)}
for(n=0, 20, print1(a(n), ", "))
CROSSREFS
KEYWORD
nonn
AUTHOR
Paul D. Hanna, Sep 18 2013
STATUS
approved