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A305355
Expansion of Product_{k>=1} (1 - x^(k*(3*k-1)/2)).
3
1, -1, 0, 0, 0, -1, 1, 0, 0, 0, 0, 0, -1, 1, 0, 0, 0, 1, -1, 0, 0, 0, -1, 1, 0, 0, 0, 1, -1, 0, 0, 0, 0, 0, 1, -2, 1, 0, 0, -1, 2, -1, 0, 0, 0, 0, 0, 1, -1, 0, 0, -1, 0, 1, 0, 0, 1, 0, -1, 0, 0, 0, -1, 2, -1, 0, 0, 0, -1, 0, 0, 1, 0, 1, 0, 0, -1, 0, -1, 1, 0, 0, 1
OFFSET
0,36
LINKS
MAPLE
seq(coeff(series(mul(1-x^(k*(3*k-1)/2), k=1..n), x, n+1), x, n), n=0..140); # Muniru A Asiru, May 31 2018
CROSSREFS
Product_{k>=1} (1 - x^(k*((m-2)*k-(m-4))/2)): A292518 (m=3), A276516 (m=4), this sequence (m=5).
Sequence in context: A107628 A268389 A288969 * A218380 A152815 A115296
KEYWORD
sign
AUTHOR
Seiichi Manyama, May 31 2018
STATUS
approved