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A299035
a(n) = [x^n] Product_{k=1..n} 1/(1-k^k*x).
3
1, 1, 21, 23980, 4896624249, 327969374429859111, 11123496833223144303532943536, 273486179312859032380857823231575174373792, 6620886635410516590847876477644821623913997428738363459941
OFFSET
0,3
LINKS
FORMULA
a(n) ~ n^(n^2). - Vaclav Kotesovec, Feb 02 2018
MATHEMATICA
Table[SeriesCoefficient[Product[1/(1 - k^k*x), {k, 1, n}], {x, 0, n}], {n, 0, 10}] (* Vaclav Kotesovec, Feb 02 2018 *)
CROSSREFS
KEYWORD
nonn
AUTHOR
Seiichi Manyama, Feb 01 2018
STATUS
approved