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 A037473 #13 Feb 16 2022 11:13:14
%S A037473 1,2,3,4,5,10,11,12,13,14,15,20,21,22,23,24,25,30,31,32,33,34,35,40,
%T A037473 41,42,43,44,45,50,51,52,53,54,55,100,101,102,103,104,105,110,111,112,
%U A037473 113,114,115,120,121,122,123,124,125,130,131,132
%N A037473 Duplicate of A007092.
%F A037473 A007092 \ {0}. [From _R. J. Mathar_, Oct 20 2008]
%K A037473 dead
%O A037473 1,2
%A A037473 _Clark Kimberling_