OFFSET
0,4
COMMENTS
a(n) is odd for n = 0, 1, 2, 6, 20, 29, 46, ... ; see A035142. - Michel Marcus, Jun 19 2015
LINKS
Giovanni Resta, Table of n, a(n) for n = 0..10000
MATHEMATICA
DivisorSigma[0, PartitionsQ@ Range[0, 100]]
PROG
(PARI) a(n) = numdiv(polcoeff(prod(k=1, n, 1 + x^k, 1 + x * O(x^n)), n)); \\ Michel Marcus, Jun 19 2015
CROSSREFS
KEYWORD
nonn
AUTHOR
Giovanni Resta, Jun 04 2015
STATUS
approved