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 A224857 #14 Jul 23 2013 03:42:53 %S A224857 0,3,11,14,16,21,23,26,37,38,42,44,45,47,52,60,74,75,81,91,98,100,114, %T A224857 131,142,144,152,154,156,177,178,185,196,200,201,203,213,219,220,222, %U A224857 233,235,245,247,250,284,296,298,299,306,310,317,318,319,322,333 %N A224857 Numbers n such that 90n + 41 and 90n + 43 are twin primes. %C A224857 All matching entries for A202104 and A202105 are twin prime. %t A224857 Select[Range[0, 499], PrimeQ[90# + 41] && PrimeQ[90# + 43] &] (* _Alonso del Arte_, Jul 22 2013 *) %Y A224857 Cf. A202104, A202105. %K A224857 nonn,easy %O A224857 1,2 %A A224857 _J. W. Helkenberg_, Jul 22 2013 %E A224857 More terms from _Alonso del Arte_, Jul 22 2013