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 A249772 #41 Jun 30 2019 10:15:38 %S A249772 0,0,0,0,1,0,2,0,0,1,10,0,12,2,1,0,16,0,9,1,2,10,11,0,5,12,0,2,14,1,6, %T A249772 0,10,16,2,0,4,9,12,1,40,2,3,10,1,11,23,0,14,5,16,12,26,0,10,2,9,14, %U A249772 58,1,60,6,2,0,12,10,33,16,11,2,35,0,36,4,5,9,10,12,78,1,0,40,82,2,16 %N A249772 Period of the senary (base-6) representation of 1/n, or 0 if 1/n terminates. %H A249772 Wikipedia, <a href="https://en.wikipedia.org/wiki/Senary">Senary</a> %e A249772 a(7)=2, because 1/7 has senary period 2 (0.0505050505...). %t A249772 f[n_] := Length[ RealDigits[1/n, 6][[1, -1]]]; Array[f, 85] (* _Robert G. Wilson v_, Jan 09 2015 *) %Y A249772 Cf. A051626 (base 10), A246004 (base 12). %Y A249772 With ones instead of zeros: A007737, A066799 (all bases as columns). %K A249772 nonn,base,easy %O A249772 1,7 %A A249772 _Michal Kaczmarczyk_, Dec 03 2014 %E A249772 More terms from _Robert G. Wilson v_, Jan 09 2015