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 A063596 #13 Jun 19 2018 05:55:48
%S A063596 0,10,9,13,19,43,56,41,94,79,113,100,88,112,124,127,138,176,144,175,
%T A063596 174,168,170,210,245,228,182,237,287,260,312,321,294,347,389,365,401,
%U A063596 386,390,419,460,425,438,426,488,490,520,458,489,521,513
%N A063596 Least k >= 0 such that 6^k has exactly n 0's in its decimal representation.
%t A063596 a = {}; Do[k = 0; While[ Count[ IntegerDigits[6^k], 0] != n, k++ ]; a = Append[a, k], {n, 0, 50} ]; a
%t A063596 With[{pwr6=Table[{n,DigitCount[6^n,10,0]},{n,1000}]},Join[{0},Transpose[ Table[ SelectFirst[pwr6,#[[2]]==i&],{i,60}]][[1]]]] (* _Harvey P. Dale_, Dec 15 2014 *)
%o A063596 (PARI) A063596(n)=for(k=0, oo, #select(d->!d, digits(6^k))==n&&return(k)) \\ _M. F. Hasler_, Jun 14 2018
%Y A063596 Cf. A031146 (analog for 2^k), A063555 (for 3^k), A063575 (for 4^k), A063585 (for 5^k), A063606 (for 7^k), A063616 (for 8^k), A063626 (for 9^k).
%K A063596 base,nonn
%O A063596 0,2
%A A063596 _Robert G. Wilson v_, Aug 10 2001
%E A063596 a(0) changed to 0 (as in A031146, A063555, ...) and better title from _M. F. Hasler_, Jun 14 2018