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A061063 a(n) = 2^(2^n)*3^(2^n) - 2^(2^n) - 3^(2^n). 1
1, 23, 1199, 1672799, 2821066795199, 7958661108093376400572799, 63340286662973277702728603126500927381164903187199 (list; graph; refs; listen; history; text; internal format)
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: A202656 A340487 A321569 * A100768 A201309 A049003

Adjacent sequences:  A061060 A061061 A061062 * A061064 A061065 A061066

KEYWORD

nonn

AUTHOR

Jason Earls, May 27 2001

STATUS

approved

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Last modified June 14 01:29 EDT 2021. Contains 345016 sequences. (Running on oeis4.)