1,1

Index entries for sequences of n such that k*2^n-1 (or k*2^n+1) is prime

See A001771 for more terms.

Sequence in context: A094459 A108819 A139233 this_sequence A094491 A050241 A046296

Adjacent sequences: A050520 A050521 A050522 this_sequence A050524 A050525 A050526

nonn,nice

njas, Dec 29 1999