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A165711
a(n) = Sum_{k=1..n} k!^k!.
1
1, 5, 46661, 1333735776850284124449081472890437
OFFSET
1,2
COMMENTS
The next term has 250 digits. - Harvey P. Dale, Dec 19 2014
MATHEMATICA
s=0; lst={}; Do[AppendTo[lst, s+=n!^n! ], {n, 1, 6, 1}]; lst
Accumulate[Table[(k!)^k!, {k, 5}]] (* Harvey P. Dale, Dec 19 2014 *)
PROG
(PARI) a(n)=sum(k=1, n, k!^k!) \\ Charles R Greathouse IV, Oct 12 2009
CROSSREFS
Cf. A165710.
Sequence in context: A193148 A307492 A355959 * A167369 A259161 A356762
KEYWORD
nonn
AUTHOR
STATUS
approved