1,1

M. V. Subbarao, On two congruences for primality. Pacific J. Math. 52 (1974), 261-268.

J. Roberts, Lure of the Integers, Math. Assoc. America, 1992, p. 147.

Cf. A051948.

Sequence in context: A019147 A026722 A151520 this_sequence A088228 A108636 A101143

Adjacent sequences: A002267 A002268 A002269 this_sequence A002271 A002272 A002273

nonn,fini,full,bref

N. J. A. Sloane (njas(AT)research.att.com).

Definition corrected by Tanya Khovanova, Nov 05 2007