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 A033662 #5 Mar 30 2012 18:35:33
%S A033662 4,9,13,15,17,18,19,20,21,22,23,24,25,26,27,28,29,30,31,32,33,34,35,
%T A033662 36,37,38,39,40,41,42,43,44,45,46,47,48,49,50,51,52,53,54,55,56,57,58,
%U A033662 59,60,61,62,63,64,65,66,67,68,69,70,71,72,73,74,75,76,77,78,79,80,81,82
%N A033662 Possible digital sums of Smith numbers (conjectural).
%C A033662 Numbers not in sequence are not digital sums of Smith numbers. Numbers in sequence are almost certainly so.
%F A033662 a(n) in {4, 9, 13, 15} or a(n) >= 17
%Y A033662 Cf. A006753.
%K A033662 base,nonn
%O A033662 1,1
%A A033662 _David W. Wilson_