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 A055598 #4 Mar 30 2012 18:37:42 %S A055598 12,20,24,34,36,38,46,52,54,58,60,70,72,74,78,80,84,88,94,98,100,106, %T A055598 108,110,112,116,118,120,124,126,128,136,140,142,144,148,152,154,158, %U A055598 160,166,170,174,180,182,184,188,190,198,204,206,210,212,214,216,224,226,228,230,232,236,238,240,242,244,256,258,264,266,268,272,274,276,278,280 %N A055598 Even numbers not the sum of two terms from A034757. %K A055598 nonn,easy %O A055598 1,1 %A A055598 _Wouter Meeussen_, Jun 02 2000