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 A140854 #14 Sep 08 2022 08:45:35 %S A140854 61,271,691,1321,1531,1741,1951,2161,2371,2791,3001,3631,4051,4261, %T A140854 5101,5521,6151,6361,6571,6781,6991,7411,7621,8461,9091,9511,9721, %U A140854 9931,10141,10771,11821,12241,12451,13291,13711,13921,14341,14551,15391,15601 %N A140854 Primes of the form 210k + 61. %t A140854 Select[61+210Range[0,150],PrimeQ] (* _Ray Chandler_, Apr 29 2010 *) %o A140854 (Magma) [ a: n in [0..900] | IsPrime(a) where a is 210*n+61] // _Vincenzo Librandi_, Nov 24 2010 %Y A140854 Cf. A073102. %K A140854 nonn %O A140854 1,1 %A A140854 _Juri-Stepan Gerasimov_, Jul 04 2008 %E A140854 Corrected and extended by several authors, Apr 29 2010