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 A023801 #14 Mar 22 2025 17:36:16 %S A023801 0,1,2,3,4,5,6,8,9,10,11,12,13,15,16,17,18,19,20,22,23,24,25,26,27,29, %T A023801 30,31,32,33,34,38,39,40,41,48,51,52,53,54,56,58,59,60,62,63,65,66,68, %U A023801 69,70,73,75,76,77,78,81,82,83,90,91,94,95,96,97,99,101,102 %N A023801 Xenodromes: numbers such that all digits in base 6 are different. %H A023801 Nathaniel Johnston, <a href="/A023801/b023801.txt">Table of n, a(n) for n = 1..1631</a> (full sequence) %t A023801 Select[Range[0, 150], Max[DigitCount[#, 6]] == 1 &] (* _Paolo Xausa_, Mar 22 2025 *) %Y A023801 Cf. A023798 - A023810. %K A023801 nonn,base,fini,full,easy %O A023801 1,3 %A A023801 _Olivier Gérard_