OFFSET
0,2
LINKS
Alois P. Heinz, Table of n, a(n) for n = 0..250
FORMULA
a(n) = [x^(6^n)] Product_{j=1..6} 1/(1-x^j).
G.f.: -(29386561536*x^7 +220531481280*x^6 +188259164496*x^5 -77061923145*x^4 +2575778195*x^3 -12336681*x^2 +9320*x-1) / Product_{j=0..5} 1-6^j*x.
MAPLE
gf:= -(29386561536*x^7 +220531481280*x^6 +188259164496*x^5 -77061923145*x^4 +2575778195*x^3 -12336681*x^2+9320*x-1)/ mul(1-6^j*x, j=0..5):
a:= n-> coeff(series(gf, x, n+1), x, n):
seq(a(n), n=0..20);
CROSSREFS
KEYWORD
nonn
AUTHOR
Alois P. Heinz, Mar 01 2014
STATUS
approved