1,1

H. Dubner, Generalized repunit primes, Math. Comp., 61 (1993), 927-930.

H. Lifchitz, Mersenne and Fermat primes field

Sequence in context: A056725 A091738 A136054 this_sequence A066148 A093932 A141173

Adjacent sequences: A006029 A006030 A006031 this_sequence A006033 A006034 A006035

hard,nonn

njas

One more term from Herman Jamke (hermanjamke(AT)fastmail.fm), Jan 05 2008