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A285286
Expansion of Product_{k>=0} 1/(1 + x^(3*k+1))^(3*k+1).
2
1, -1, 1, -1, -3, 3, -3, -4, 14, -14, 4, 24, -44, 31, 37, -107, 126, -4, -208, 329, -175, -319, 777, -704, -236, 1507, -1945, 430, 2532, -4575, 2781, 3236, -9301, 8697, 2085, -16902, 21804, -5233, -26573, 47225, -27047, -34332, 92242, -80162, -26926, 162426
OFFSET
0,5
LINKS
MATHEMATICA
nmax = 50; CoefficientList[Series[Product[1/(1 + x^(3*k-2))^(3*k-2), {k, 1, nmax}], {x, 0, nmax}], x] (* Vaclav Kotesovec, Apr 16 2017 *)
CROSSREFS
Product_{k>=0} 1/(1 + x^(m*k+1))^(m*k+1): A284628 (m=2), this sequence (m=3), A285287 (m=4).
Cf. A262949.
Sequence in context: A108688 A266688 A347139 * A123371 A011277 A376659
KEYWORD
sign
AUTHOR
Seiichi Manyama, Apr 16 2017
STATUS
approved