OFFSET
0,6
LINKS
Paul D. Hanna, Table of n, a(n) for n = 0..1000
EXAMPLE
G.f.: A(x) = 1 + x + x^2 + x^3 + 2*x^5 - 2*x^6 + 2*x^7 - 2*x^8 + x^10 +...
where
A(x) = 1/((1 - x/A(x)) * (1 - x^2/A(x^2)^2) * (1 - x^3/A(x^3)^3) *...).
PROG
(PARI) {a(n)=local(A=1+x); for(i=1, n, A=1/prod(k=1, n, (1-x^k/subst(A, x, x^k+x*O(x^n))^k))); polcoeff(A, n)}
CROSSREFS
KEYWORD
sign
AUTHOR
Paul D. Hanna, Jan 31 2012
STATUS
approved