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 A240945 #12 Sep 08 2022 08:46:07 %S A240945 1,9,81,729,6561,531441,4782969,282429536481,2541865828329, %T A240945 22876792454961,16677181699666569,278128389443693511257285776231761 %N A240945 Powers of 9 without the digit '0' in their decimal expansion. %C A240945 Conjectured to be finite. %t A240945 Select[9^Range[0, 2*10^5], DigitCount[#, 10, 0]==0 &] %o A240945 (Magma) [9^n: n in [0..3*10^4] | not 0 in Intseq(9^n)]; %Y A240945 Cf. A030705. %Y A240945 Cf. similar sequences listed in A245853. %K A240945 nonn,base %O A240945 1,2 %A A240945 _Vincenzo Librandi_, Aug 04 2014