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 A195944 #26 May 24 2023 19:01:49
%S A195944 0,1,2,3,4,5,7,10,14
%N A195944 Numbers k such that 13^k has no zero in its decimal expansion.
%C A195944 Probably finite. Is 14 the largest term?
%H A195944 Carlos Rivera, <a href="http://www.primepuzzles.net/puzzles/puzz_607.htm">Puzzle 607. A zeroless Prime power</a>
%F A195944 Equals { n | A001022(n) is in A052382 }.
%t A195944 Select[Range[0,20],DigitCount[13^#,10,0]==0&] (* _Harvey P. Dale_, May 24 2023 *)
%o A195944 (PARI) for( n=0,9999, is_A052382(13^n) && print1(n","))
%o A195944 (Magma) [n: n in [0..1000] | not 0 in Intseq(13^n) ]; // _Vincenzo Librandi_, May 06 2015
%Y A195944 Cf. A195942, A195943, A195945, A195946, A195908, A195948, A052382, A007377, A008839, A030700, A030701, A030702, A030704, A030705, A030706.
%K A195944 nonn,base
%O A195944 1,3
%A A195944 _M. F. Hasler_, Sep 25 2011
%E A195944 Keyword:fini removed by _Jianing Song_, Jan 28 2023 as finiteness is only conjectured.