1,2

Diana Mecum, Table of n, a(n) for n = 1..725

For n = 1 and 2 the smallest prime that is congruent to 1 (mod n) equals the smallest prime that is congruent to -1 (mod n). For all other n the inequality is strict.

Cf. A093868, A140180.

Sequence in context: A004742 A277817 A100290 * A038032 A010408 A010455

Adjacent sequences: A140178 A140179 A140180 * A140182 A140183 A140184

nonn

Leroy Quet, May 11 2008

More terms from Diana L. Mecum, Jul 04 2008

approved