OFFSET
0,3
LINKS
Seiichi Manyama, Table of n, a(n) for n = 0..500
FORMULA
Convolution inverse of A293204.
PROG
(PARI) Vec(prod(m=1, 50, 1/(1 + x^m + 2!*x^(2*m))) + O(x^50)) \\ Michel Marcus, Oct 05 2017
CROSSREFS
KEYWORD
sign
AUTHOR
Seiichi Manyama, Oct 04 2017
STATUS
approved