OFFSET
0,3
COMMENTS
Number of partitions of n into distinct prime parts, where prime(k) different parts of size prime(k) are available (2a, 2b, 3a, 3b, 3c, ...).
EXAMPLE
a(6) = 3 because we have [3a, 3b], [3a, 3c] and [3b, 3c].
MATHEMATICA
nmax = 50; CoefficientList[Series[Product[(1 + x^Prime[k])^Prime[k], {k, 1, nmax}], {x, 0, nmax}], x]
CROSSREFS
KEYWORD
nonn
AUTHOR
Ilya Gutkovskiy, Aug 28 2017
STATUS
approved