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 A055222 #4 Mar 30 2012 18:57:04 %S A055222 1,8,45,211,891,3510,13170,47672,167898,578769,1961103,6552549, %T A055222 21641343,70784235,229620285,739640331,2368022638,7541358405, %U A055222 23905443556,75468582776,237388273398,744299007994,2326899224352 %N A055222 T(2n+6,n), array T as in A055216. %K A055222 nonn %O A055222 0,2 %A A055222 _Clark Kimberling_, May 07 2000