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 A239011 #28 Jan 24 2020 16:20:11
%S A239011 0,2,3,4,6,7,8,12,17,24,29,42,44,101,104,128,1015,1108,2629,9683,
%T A239011 676076,917474,34882222,53229360,58230015,90064345,309000041,
%U A239011 319582553,342860474,382090917,2770253437,4380407969,4407585753,6966554399,21235488251,99404304146
%N A239011 Exponents m such that the decimal expansion of 6^m exhibits its first zero from the right later than any previous exponent.
%C A239011 Assume that a zero precedes all decimal expansions. This will take care of those cases in A030702.
%C A239011 Inspired by the seqfan list discussion Re: "possible sequence", beginning with David Wilson 7:57 PM Mar 06 2014 and continued by _M. F. Hasler_, _Allan C. Wechsler_ and _Franklin T. Adams-Watters_.
%t A239011 f[n_] := Position[ Reverse@ Join[{0}, IntegerDigits[ PowerMod[6, n, 10^500]]], 0, 1, 1][[1, 1]]; k = mx = 0; lst = {}; While[k < 10000001, c = f[k]; If[c > mx, mx = c; AppendTo[ lst, k]; Print@ k]; k++]; lst
%Y A239011 Cf. A000400, A030702, A020665, A031142, A239008, A239009, A239010, A239012, A239013, A239014, A239015.
%K A239011 nonn,base
%O A239011 1,2
%A A239011 _Charles R Greathouse IV_ and _Robert G. Wilson v_, Mar 14 2014
%E A239011 a(27)-a(34) from _Bert Dobbelaere_, Jan 21 2019
%E A239011 a(35)-a(36) from _Chai Wah Wu_, Jan 23 2020