OFFSET
1,3
LINKS
EXAMPLE
a(3) = 2 because third square of prime is 25 and we have [25], [9, 4, 4, 4, 4].
MATHEMATICA
Table[SeriesCoefficient[Product[1/(1 - x^Prime[k]^2), {k, 1, n}], {x, 0, Prime[n]^2}], {n, 1, 30}]
CROSSREFS
KEYWORD
nonn
AUTHOR
Ilya Gutkovskiy, Jun 14 2017
STATUS
approved