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 A140850 #12 Sep 08 2022 08:45:35 %S A140850 47,257,467,677,887,1097,1307,2357,2777,3407,3617,4457,4877,5087,5297, %T A140850 5507,5717,5927,6977,7187,7607,7817,8237,8447,8867,9497,10337,11177, %U A140850 11597,11807,12227,12437,12647,13487,13697,13907,14327,14537,14747 %N A140850 Primes of the form 210k + 47. %t A140850 Select[47+210Range[0,150],PrimeQ] (* _Ray Chandler_, Apr 29 2010 *) %o A140850 (Magma) [ a: n in [0..900] | IsPrime(a) where a is 210*n+47] // _Vincenzo Librandi_, Nov 24 2010 %Y A140850 Cf. A073102. %K A140850 nonn %O A140850 1,1 %A A140850 _Juri-Stepan Gerasimov_, Jul 04 2008 %E A140850 Extended by several authors, Apr 29 2010