A339311 a(n) = Sum_{k=1..n} (k!)^n.
1, 5, 225, 333089, 24891170433, 139317055679149697, 82606511560391889386751489, 6984964663477899063759529684476994049, 109110688697205077023425816926479750793809817618433, 395940866162019279867473563258123776010342586429441374123441432577
Offset: 1
Keywords
Links
- Seiichi Manyama, Table of n, a(n) for n = 1..30
Crossrefs
Programs
-
Mathematica
a[n_] := Sum[(k!)^n, {k, 1, n}]; Array[a, 10] (* Amiram Eldar, Apr 28 2021 *) -
PARI
{a(n) = sum(k=1, n, k!^n)}