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 A004182 #11 Feb 13 2024 16:57:54
%S A004182 0,1,2,3,4,5,6,0,8,9,10,11,12,13,14,15,16,1,18,19,20,21,22,23,24,25,
%T A004182 26,2,28,29,30,31,32,33,34,35,36,3,38,39,40,41,42,43,44,45,46,4,48,49,
%U A004182 50,51,52,53,54,55,56,5,58,59,60,61,62,63,64,65,66,6,68,69,0,1,2
%N A004182 Omit 7's from n.
%H A004182 Alois P. Heinz, <a href="/A004182/b004182.txt">Table of n, a(n) for n = 0..20000</a>
%t A004182 FromDigits[Flatten[IntegerDigits[#]/.(7->{})]]&/@Range[0,80] (* _Harvey P. Dale_, Jun 09 2013 *)
%K A004182 nonn,base
%O A004182 0,3
%A A004182 _N. J. A. Sloane_