OFFSET
0,2
LINKS
Seiichi Manyama, Table of n, a(n) for n = 0..10000
M. D. Hirschhorn, Basis partitions and Rogers-Ramanujan partitions, Discrete Math. 205 (1999), 241-243.
FORMULA
G.f.: -(x +1) * (x^2 -x +1) * (x^4 -x^3 +x^2 -x +1) * (x^4 -x^2 +1) * (x^6 -x^5 +x^4 -x^3 +x^2 -x +1) * (x^6 -x^3 +1) * (x^8 +1) / ((x -1)^9 * (x^2 +x +1)^3 * (x^4 +x^3 +x^2 +x +1) * (x^6 +x^3 +1) * (x^6 +x^5 +x^4 +x^3 +x^2 +x +1)). - Colin Barker, Jul 13 2013
PROG
(PARI) s=9; a(n)=polcoeff(prod(i=1, s, (1+x^i))/(prod(i=1, s, (1-x^i))+x*O(x^n)), n) for(n=0, 50, print1(a(n), ", "))
CROSSREFS
KEYWORD
nonn,easy
AUTHOR
Benoit Cloitre, Apr 13 2002
STATUS
approved