This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.
%I A217862 #7 Mar 03 2018 18:11:40 %S A217862 2521,3361,4201,5881,7561,9241,12601,13441,14281,15121,18481,20161, %T A217862 21001,21841,26041,26881,29401,30241,31081,33601,35281,41161,42841, %U A217862 45361,47041,47881,51241,52081,54601,55441,63841,65521,66361,68041,68881,74761,76441,78121 %N A217862 Primes p of the form p = 1 + 840*k for some k. %C A217862 This is a prime sequence based on the wheel factorization of 840. There are 192 congruence classes that form prime wheel spokes mod 840. %H A217862 Harvey P. Dale, <a href="/A217862/b217862.txt">Table of n, a(n) for n = 1..1000</a> %t A217862 Select[Prime[Range[5000]], Mod[#, 840] == 1 &] %t A217862 Select[840*Range[0,100]+1,PrimeQ] (* _Harvey P. Dale_, Mar 03 2018 *) %K A217862 nonn,easy %O A217862 1,1 %A A217862 _Joshua S.M. Weiner_, Oct 13 2012