A008974 Triangular number t(n) raised to power t(n).

1, 27, 46656, 10000000000, 437893890380859375, 5842587018385982521381124421, 33145523113253374862572728253364605812736, 106387358923716524807713475752456393740167855629859291136

Offset: 1

Author

N. J. A. Sloane

Keywords

• nonn

Links

• Vincenzo Librandi, Table of n, a(n) for n = 1..25

Crossrefs

Cf. A000217.

Programs

Maple

[ seq( ( n*(n+1)/2 )^( n*(n+1)/2 ), n=1..10) ];

Mathematica

s=0;lst={};Do[s+=n;AppendTo[lst,s^s],{n,12}];lst (* Vladimir Joseph Stephan Orlovsky, Jun 11 2009 *)
#^#&/@Accumulate[Range[10]] (* Harvey P. Dale, Sep 10 2014 *)

PARI

a(n) = my(t=n*(n+1)/2); t^t; \\ Michel Marcus, Jan 16 2018

Extensions

One more term added by Vladimir Joseph Stephan Orlovsky, Jun 11 2009