OFFSET
0,3
COMMENTS
For n > 2, a(n) is the n-th term of the Euler transform of n-gonal numbers.
LINKS
Vaclav Kotesovec, Table of n, a(n) for n = 0..1000
N. J. A. Sloane, Transforms
FORMULA
a(n) ~ c * d^n / sqrt(n), where d = 4.3505530790182509701639869563721679988879373943131559534408716195123... and c = 0.2276354216252041005336767937139336687746108521151301186102034... - Vaclav Kotesovec, Aug 18 2018
MATHEMATICA
Table[SeriesCoefficient[Exp[Sum[x^k (1 + (n - 3) x^k)/(k (1 - x^k)^3), {k, 1, n}]], {x, 0, n}], {n, 0, 26}]
CROSSREFS
KEYWORD
nonn
AUTHOR
Ilya Gutkovskiy, Aug 18 2018
STATUS
approved