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 A304033 #4 May 06 2018 12:44:11 %S A304033 1,9,25,57,89,129,177,249,313,409,489,593,705,817,945,1097,1257,1401, %T A304033 1561,1729,1921,2137,2313,2521,2745,2977,3233,3473,3745,4009,4265, %U A304033 4561,4865,5201,5489,5801,6153,6473,6889,7201,7585,7977,8329,8761,9161,9617,10017 %N A304033 Partial sums of A303981. %Y A304033 Cf. A303981. %K A304033 nonn %O A304033 0,2 %A A304033 _Rémy Sigrist_, May 05 2018