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 A047127 #4 Mar 30 2012 18:56:53 %S A047127 1,3,10,35,127,467,1736,6510,24591,93427,356620,1366586,5254256, %T A047127 20259304,78309078,303346956,1177325247,4577098533,17821458618, %U A047127 69484705346,271251048911,1060085370591,4147198630980,16239629491179 %N A047127 T(n,n+2), array T as in A047120. %K A047127 nonn %O A047127 0,2 %A A047127 _Clark Kimberling_