A140383 Prime triples of the form p, 2^p -1, 2^(2^p)+1 derived from a single prime p.

2, 3, 17, 3, 7, 257

Offset

1,1

Comments

List is probably complete (see comments in A000215, A019434).

Links

Table of n, a(n) for n=1..6.

Example

(2,3,17) is a triple of 3 primes 2, 2^2-1, 2^4+1.

Crossrefs

Cf. A000040, A000043, A000668, A000215.

Sequence in context: A005273 A171990 A103898 * A029913 A073125 A171240

Adjacent sequences: A140380 A140381 A140382 * A140384 A140385 A140386

Keyword

nonn,less

Author

Juri-Stepan Gerasimov, Jun 14 2008

Extensions

Edited by R. J. Mathar, Jun 16 2008

Status

approved