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 A140846 #13 Sep 08 2022 08:45:35 %S A140846 31,241,661,1291,2131,2341,2551,2971,3181,3391,4021,4231,4441,4651, %T A140846 4861,5281,5701,6121,6961,7591,8011,8221,8431,8641,9901,10111,10321, %U A140846 10531,11161,12211,12421,12841,13681,14731,15361,15991,16411,16831,17041 %N A140846 Primes of the form 210k + 31. %t A140846 Select[31+210Range[0,150],PrimeQ] (* _Ray Chandler_, Apr 29 2010 *) %o A140846 (Magma) [ a: n in [0..900] | IsPrime(a) where a is 210*n+31] // _Vincenzo Librandi_, Nov 24 2010 %Y A140846 Cf. A073102. %K A140846 nonn %O A140846 1,1 %A A140846 _Juri-Stepan Gerasimov_, Jul 04 2008 %E A140846 Extended by _Ray Chandler_, Apr 29 2010 %E A140846 More terms from _Vincenzo Librandi_, Apr 28 2010