cp's OEIS Frontend

A140181 A number n is included if the smallest prime that is congruent to 1 (mod n) is >= the smallest prime that is congruent to -1 (mod n).

%I A140181 #10 Apr 09 2014 10:14:41
%S A140181 1,2,3,4,6,7,8,9,12,14,15,17,18,19,20,21,24,27,30,31,32,34,37,38,42,
%T A140181 44,45,47,48,49,51,54,55,57,59,60,62,64,68,69,71,72,74,75,76,77,79,80,
%U A140181 84,85,87,90,91,94,97,98,99,102,103,104,107,108,109,110,114,115,117
%N A140181 A number n is included if the smallest prime that is congruent to 1 (mod n) is >= the smallest prime that is congruent to -1 (mod n).
%H A140181 Diana Mecum, <a href="/A140181/b140181.txt">Table of n, a(n) for n = 1..725</a>
%e A140181 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.
%Y A140181 Cf. A093868, A140180.
%K A140181 nonn
%O A140181 1,2
%A A140181 _Leroy Quet_, May 11 2008
%E A140181 More terms from _Diana L. Mecum_, Jul 04 2008