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 A270038 #15 Oct 14 2019 04:44:36
%S A270038 6,8,60,560,870899850,871017138,871017138,65473886952,65473886954
%N A270038 a(n) = Smallest m >= 3 containing no ones when represented in any base from 3 through n.
%C A270038 It remains to be determined if the sequence is finite.
%C A270038 a(12) > 3.4*10^30, if it exists. - _Giovanni Resta_, Oct 14 2019
%t A270038 Table[SelectFirst[Range[3, 10^3], Total@ Map[Function[k, DigitCount[#, k, 1]], Range[3, n]] == 0 &], {n, 3, 7}] /. n_ /; MissingQ@ n -> Nothing (* _Michael De Vlieger_, Mar 10 2016, Version 10.2 *)
%Y A270038 Cf. A270028, A270037, A216192, A270039, A270040, A270041, A270042, A270043, A270044, A270045.
%K A270038 nonn,base,more
%O A270038 3,1
%A A270038 _Nathan Fox_, Mar 09 2016