A165711 a(n) = Sum_{k=1..n} k!^k!.

1, 5, 46661, 1333735776850284124449081472890437

Offset

1,2

Comments

The next term has 250 digits. - Harvey P. Dale, Dec 19 2014

Links

Table of n, a(n) for n=1..4.

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

a(n)=sum(k=1, n, k!^k!)

Crossrefs

Cf. A165710.

Sequence in context: A193148 A307492 A355959 * A167369 A259161 A356762

Adjacent sequences: A165708 A165709 A165710 * A165712 A165713 A165714

Keyword

nonn

Author

Vladimir Joseph Stephan Orlovsky, Sep 24 2009

Extensions

Program by Charles R Greathouse IV, Oct 12 2009

Status

approved