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 A026888 #4 Mar 30 2012 18:56:11 %S A026888 1,5,22,95,413,1823,8196,37568,175542,835526,4046264,19909703, %T A026888 99391155,502637329,2571355930,13288938738,69296856372,364220714252, %U A026888 1927675740374,10265166063864,54960921754824,295688640900428 %N A026888 T(2n+1,n+2), T given by A026769. %K A026888 nonn %O A026888 1,2 %A A026888 _Clark Kimberling_