1,2

Diana Mecum, Table of n, a(n) for n = 1..567

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, A140181.

Sequence in context: A140707 A257086 A136817 * A175324 A056704 A230408

Adjacent sequences: A140177 A140178 A140179 * A140181 A140182 A140183

nonn

Leroy Quet, May 11 2008

More terms from Diana L. Mecum, Jul 04 2008

approved