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 A026365 #4 Mar 30 2012 18:56:06 %S A026365 0,12,24,40,60,111,143,217,261,358,414,534,602,674,750,909,997,1179, %T A026365 1279,1383,1491,1712,1832,2076,2208,2344,2484,2767,2919,3225,3389, %U A026365 3557,3729,4074,4258,4626,4822,5213,5421,5835,6055 %N A026365 Sum of the numbers between the two n's in A026362. %K A026365 nonn %O A026365 1,2 %A A026365 _Clark Kimberling_