1,3

Table of n, a(n) for n=1..18.

Carlos Rivera, 1(1198).4.1(3304).4441 .

Carlos Rivera, Puzzle 403. 833021343.

a(14)=4503 because 4^k + 4503 for 0<k<15 are prime and there is no smaller number with this property.

Cf. A130004.

Sequence in context: A175329 A081218 A240422 * A098581 A238997 A240260

Adjacent sequences: A130000 A130001 A130002 * A130004 A130005 A130006

hard,more,nonn

Farideh Firoozbakht, May 30 2007, Jun 04 2007

More terms from Jens Kruse Andersen, Jun 08 2007

approved