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 A163396 #8 Mar 30 2012 17:38:11 %S A163396 21,23,25,27,29,41,43,45,47,49,61,63,65,67,69,81,83,85,87,89,201,209, %T A163396 227,229,241,243,261,263,287,289,403,407,421,427,443,449,463,469,481, %U A163396 487,603,607,623,629,641,647,661,667,683,689,801,809,821 %N A163396 Primes in carryless arithmetic mod 10 in which all digits except the rightmost are even. %C A163396 These are called e-type primes. %H A163396 <a href="/index/Ca#CARRYLESS">Index entries for sequences related to carryless arithmetic</a> %Y A163396 A169887 = A163396 union A169984. %K A163396 nonn,base %O A163396 1,1 %A A163396 _David Applegate_, _Marc LeBrun_ and _N. J. A. Sloane_, Aug 24 2010