OFFSET
0,3
LINKS
Vaclav Kotesovec, Table of n, a(n) for n = 0..5000
FORMULA
a(n) ~ c * 2^(n/2), where
c = 14.317325023208603416271945494838289608390197678435231... if n is even,
c = 13.388403642510880418401945468592189683402616378443965... if n is odd.
MATHEMATICA
nmax = 40; CoefficientList[Series[Product[1/(1 - (3*k-1)*x^(3*k-1)), {k, 1, nmax}], {x, 0, nmax}], x]
CROSSREFS
KEYWORD
nonn
AUTHOR
Vaclav Kotesovec, Dec 15 2015
STATUS
approved