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 A032627 #7 Mar 09 2015 09:35:18 %S A032627 37,59,1721,2731,3539,3943,4549,4751,6367,6569,8387,9397,99103,113117, %T A032627 123127,147151,149153,173177,185189,203207,209213,213217,219223, %U A032627 227231,239243,249253,255259,263267,267271,285289,287291 %N A032627 Primes that are concatenations of n with n + 4. %Y A032627 Cf. A032609, A032619. %K A032627 nonn,base %O A032627 1,1 %A A032627 _Patrick De Geest_, May 15 1998 %E A032627 Edited by _Charles R Greathouse IV_, Apr 28 2010