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 A026875 #4 Mar 30 2012 18:56:11 %S A026875 1,10,67,379,1959,9597,45448,210514,960942,4344683,19525389,87444051, %T A026875 390992168,1747941216,7821157977,35055231757,157484297780, %U A026875 709447933434,3205851742378,14534550949750,66123187204244,301875869514852 %N A026875 T(2n,n+4), T given by A026758. %K A026875 nonn %O A026875 4,2 %A A026875 _Clark Kimberling_