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 A035061 #14 Sep 08 2022 08:44:52
%S A035061 0,1,2,3,5,7,9,10,11,13,17,19,21,22,25,27,30,33,37,39,41,45,47,53,54,
%T A035061 57,90,93
%N A035061 Numbers n such that 2^n does not contain the digit 6 (probably finite).
%t A035061 Join[{0}, Select[Range@10000, FreeQ[IntegerDigits[2^#], 6] &]] (* _Vincenzo Librandi_, May 07 2015 *)
%o A035061 (Magma) [n: n in [0..1000] | not 6 in Intseq(2^n) ]; // _Vincenzo Librandi_, May 07 2015
%Y A035061 Cf. similar sequences listed in A035064.
%K A035061 nonn,base
%O A035061 1,3
%A A035061 _Patrick De Geest_, Nov 15 1998
%E A035061 Initial 0 added by _Vincenzo Librandi_, May 07 2015