A083020 Prime factors of 3^(3^n) + 2.

5, 29, 5, 31, 127, 11, 693236134999, 5, 15679, 2372959, 5945531, 3312453269, 121032673159, 87189642485960958202911070585860771696964072404731750085525219437990967093723439943475549906831683116791055225665629

Offset

0,1

Comments

The last entry is 3^(3^5) + 2, a probable prime. Conjecture: These numbers have no repeating factors or 3^(3^n) + 2 is squarefree.

The Magma Calculator (http://magma.maths.usyd.edu.au/calc/) confirms that the term given above for a(13) is, in fact, prime. - Jon E. Schoenfield, Aug 24 2009

Links

Table of n, a(n) for n=0..13.

Crossrefs

Sequence in context: A348350 A132550 A154587 * A033503 A181616 A057206

Adjacent sequences: A083017 A083018 A083019 * A083021 A083022 A083023

Keyword

easy,nonn

Author

Cino Hilliard, May 31 2003

Extensions

Corrected by T. D. Noe, Nov 15 2006

Status

approved