A167536 a(n) = 3^(2^n) - 2^(2^n).

1, 5, 65, 6305, 42981185, 1853015893884545, 3433683820274065740584139537665, 11790184577738583171520532579045597727214748217668409340885505

Offset: 0

Author

Jamel Ghanouchi, Nov 06 2009

Keywords

• nonn

Crossrefs

Cf. A118004.

Programs

Magma

[3^(2^n)-2^(2^n): n in [0..10]]; // Vincenzo Librandi Jun 15 2016

Maple

A167536 := proc(n) 3^(2^n)-2^(2^n) ; end proc: seq(A167536(n),n=1..10) ; # R. J. Mathar, Nov 07 2009

Mathematica

a[n_]:= 2^n; Table[3^a[n] - 2^a[n], {n, 0, 10}] (* G. C. Greubel, Jun 14 2016 *)
Table[3^(2^n) - 2^(2^n), {n, 0, 10}] (* Vincenzo Librandi, Jun 15 2016 *)

Formula

a(n)= A001047(2^n).

Extensions

Edited by R. J. Mathar, Nov 11 2009

Offset changed from 1 to 0 from Vincenzo Librandi, Jun 15 2016