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 A140843 #14 Sep 08 2022 08:45:35 %S A140843 19,229,439,859,1069,1279,1489,1699,2539,2749,3169,4219,4639,5059, %T A140843 5479,5689,6529,6949,7159,7369,7789,8209,8419,8629,8839,9049,9679, %U A140843 10099,10729,10939,11149,11779,12409,12619,12829,13249,13669,13879,14929 %N A140843 Primes of the form 210k + 19. %t A140843 Select[19+210Range[0,150],PrimeQ] (* _Ray Chandler_, Apr 29 2010 *) %o A140843 (Magma) [ a: n in [0..900] | IsPrime(a) where a is 210*n+19] // _Vincenzo Librandi_, Nov 24 2010 %Y A140843 Cf. A073102. %K A140843 nonn %O A140843 1,1 %A A140843 _Juri-Stepan Gerasimov_, Jul 04 2008 %E A140843 Extended by several authors, Apr 29 2010