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 A030702 #30 Feb 16 2025 08:32:35 %S A030702 0,1,2,3,4,5,6,7,8,12,17,24,29,44 %N A030702 Decimal expansion of 6^n contains no zeros (probably finite). %H A030702 W. Schneider, <a href="/A007496/a007496.html">NoZeros: Powers n^k without Digit Zero</a> [Cached copy] %H A030702 Eric Weisstein's World of Mathematics, <a href="https://mathworld.wolfram.com/Zero.html">Zero</a> %t A030702 Select[Range[50],FreeQ[IntegerDigits[6^#],0]&] (* _Harvey P. Dale_, Feb 26 2017 *) %o A030702 (PARI) for(n=0, 199, vecmin(digits(6^n))&& print1(n", ")) \\ _M. F. Hasler_, Mar 07 2014 %o A030702 (Magma) [n: n in [0..500] | not 0 in Intseq(6^n)]; // _Vincenzo Librandi_, Mar 08 2014 %Y A030702 Cf. A007377, A008839, A030700, A305926. %K A030702 nonn,base %O A030702 1,3 %A A030702 _Eric W. Weisstein_ %E A030702 Offset corrected and initial 0 added by _M. F. Hasler_, Mar 07 2014