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 A026353 #4 Mar 30 2012 18:56:06 %S A026353 0,4,8,17,29,38,55,67,89,114,131,161,194,216,254,279,322,368,398,449, %T A026353 482,538,597,635,699,766,809,881,927,1004,1084,1135,1220,1308,1364, %U A026353 1457,1516,1614,1715,1779,1885,1952,2063,2177,2249 %N A026353 a(n) = sum of the numbers between the two n's in A026350. %K A026353 nonn %O A026353 2,2 %A A026353 _Clark Kimberling_