login
The OEIS is supported by the many generous donors to the OEIS Foundation.

 

Logo
Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
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). 2

%I #10 Apr 09 2014 10:14:41

%S 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 44,45,47,48,49,51,54,55,57,59,60,62,64,68,69,71,72,74,75,76,77,79,80,

%U 84,85,87,90,91,94,97,98,99,102,103,104,107,108,109,110,114,115,117

%N 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 Diana Mecum, <a href="/A140181/b140181.txt">Table of n, a(n) for n = 1..725</a>

%e 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 Cf. A093868, A140180.

%K nonn

%O 1,2

%A _Leroy Quet_, May 11 2008

%E More terms from _Diana L. Mecum_, Jul 04 2008

Lookup | Welcome | Wiki | Register | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Style Sheet | Transforms | Superseeker | Recents
The OEIS Community | Maintained by The OEIS Foundation Inc.

License Agreements, Terms of Use, Privacy Policy. .

Last modified April 23 02:53 EDT 2024. Contains 371906 sequences. (Running on oeis4.)