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 A044886 #5 Mar 30 2012 18:56:49 %S A044886 3376,3377,3378,3379,3380,3381,3382,3383,3384,3385,3386,3387,3388, %T A044886 3389,3391,3407,3423,3439,3455,3471,3487,3503,3519,3535,3551,3567, %U A044886 3583,3599,3601,3602,3603,3604,3605,3606,3607,3608 %N A044886 Numbers having, in base 15, (sum of even run lengths)=(sum of odd run lengths). %K A044886 nonn,base %O A044886 1,1 %A A044886 _Clark Kimberling_