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 A023659 #3 Mar 30 2012 18:55:53 %S A023659 2,11,32,70,131,220,342,502,705,957,1263,1628,2058,2558,3133,3788, %T A023659 4528,5359,6286,7314,8448,9693,11055,12539,14150,15894,17776,19801, %U A023659 21974,24300,26785,29434,32252,35245,38418,41776,45324,49067,53011 %N A023659 Convolution of odd numbers and A001950. %K A023659 nonn %O A023659 1,1 %A A023659 _Clark Kimberling_