OFFSET
1,2
COMMENTS
The next term a(5) has 142 digits.
LINKS
Vaclav Kotesovec, Table of n, a(n) for n = 1..7
FORMULA
a(n) ~ A243263 * n^(n^2*(n+1)^2/4 - 1/120) / exp(n^4/16 - n^2/12).
MATHEMATICA
Table[Product[k^(k^3), {k, 1, n}], {n, 1, 6}]
PROG
(PARI) a(n)=prod(k=2, n, k^k^3) \\ Charles R Greathouse IV, Sep 08 2015
CROSSREFS
KEYWORD
nonn
AUTHOR
Vaclav Kotesovec, Feb 21 2015
STATUS
approved