login
A293294
G.f.: Product_{m>0} 1/(1 - x^m + 2!*x^(2*m)).
3
1, 1, 0, -1, -1, 3, 3, -1, -8, -8, 12, 24, 5, -43, -55, 40, 137, 65, -215, -356, 97, 780, 624, -941, -2199, -260, 4052, 4638, -3536, -12861, -5676, 19858, 31449, -8337, -71220, -54243, 87733, 196679, 20733, -372807, -413794, 330731, 1159718, 497517, -1821469
OFFSET
0,6
LINKS
FORMULA
Convolution inverse of A293072.
PROG
(PARI) nn = 50; Vec(prod(m=1, nn, 1/(1 - x^m + 2*x^(2*m))) + O(x^nn)) \\ Michel Marcus, Oct 05 2017
CROSSREFS
Column k=2 of A293293.
Cf. A293072.
Sequence in context: A124040 A248976 A160332 * A200342 A181330 A350253
KEYWORD
sign
AUTHOR
Seiichi Manyama, Oct 05 2017
STATUS
approved