A102908 Primes of the form 3^n + 3^4 + 1.

109, 163, 811, 2269, 31381059691, 22876792455043, 4052555153018976349, 7395104114874202511988394360121831439224179537192802989, 507528786056415600719754159741696356908742250191663887263627442114963

Offset

1,1

Comments

The following terms are too large to be displayed here, but the exponents n can be found in sequence A168170. [M. F. Hasler, Nov 25 2009]

Links

Table of n, a(n) for n=1..9.

Formula

a(n) = 3^A168170(n) + 3^4 + 1. [M. F. Hasler, Nov 25 2009]

Mathematica

Select[3^Range[150]+82, PrimeQ] (* Harvey P. Dale, Dec 18 2011 *)

Crossrefs

Sequence in context: A283792 A333743 A141948 * A141998 A061277 A142945

Adjacent sequences: A102905 A102906 A102907 * A102909 A102910 A102911

Keyword

nonn

Author

Roger L. Bagula, Mar 01 2005

Extensions

Edited by M. F. Hasler, Nov 25 2009

Status

approved