A061063 a(n) = 2^(2^n)*3^(2^n) - 2^(2^n) - 3^(2^n).

1, 23, 1199, 1672799, 2821066795199, 7958661108093376400572799, 63340286662973277702728603126500927381164903187199

Offset

0,2

Comments

For n = 1, 4, 5, 7, values are primes.

Links

Harry J. Smith, Table of n, a(n) for n = 0..10

S. M. Ruiz, New Prime Numbers

Formula

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

Mathematica

f[n_]:=Module[{n1=2^2^n, n2=3^2^n}, n1 n2-n1-n2]; f/@Range[0, 7]  (* Harvey P. Dale, Apr 04 2011 *)

Prog

(PARI) { for (n=0, 10, p=2^n; w=2^p; h=3^p; write("b061063.txt", n, " ", w*h - w - h) ) } \\ Harry J. Smith, Jul 17 2009
(Magma) [6^(2^n) - 2^(2^n) - 3^(2^n): n in [0..12]]; // Vincenzo Librandi, Apr 05 2011

Crossrefs

Sequence in context: A367772 A340487 A321569 * A372207 A100768 A353143

Adjacent sequences: A061060 A061061 A061062 * A061064 A061065 A061066

Keyword

nonn

Author

Jason Earls, May 27 2001

Status

approved