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 A133714 #7 Sep 13 2015 21:07:12 %S A133714 1,6,25,81,226,561,1277,2706,5411,10297,18788,33043,56277,93148, %T A133714 150303,237029,366135,554993,826904,1212695,1752761,2499432,3519935, %U A133714 4899801,6747052,9196983,12417949,16617932,22052383,29033069,37938516 %N A133714 Row l=4 of array in A133713. %p A133714 A133714 := proc(c) %p A133714 A133713(4,c) ; %p A133714 end proc: %p A133714 seq(A133714(c),c=0..30) ; # _R. J. Mathar_, Nov 23 2011 %K A133714 nonn %O A133714 0,2 %A A133714 _N. J. A. Sloane_, Dec 30 2007