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 A023603 #3 Mar 30 2012 18:55:53 %S A023603 2,5,9,17,25,34,48,62,78,96,116,140,165,191,220,251,284,320,359,399, %T A023603 439,484,530,579,632,685,741,798,858,920,984,1052,1123,1196,1269,1344, %U A023603 1423,1503,1585,1673,1761,1852,1946,2039,2136,2236,2336,2441 %N A023603 Convolution of A023532 and A001950. %K A023603 nonn %O A023603 1,1 %A A023603 _Clark Kimberling_