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 A382412 #8 Mar 26 2025 21:48:43 %S A382412 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 A382412 30,31,32,33,34,36,37,38,39,40,41,43,44,45,46,47,48,57,58,59,60,61,62, %U A382412 64,65,66,67,68,69,71,72,73,74,75,76,78,79,80,81,82,83,85,86,87,88,89,90 %N A382412 Numbers with no zeros in their base-7 representation. %H A382412 Paolo Xausa, <a href="/A382412/b382412.txt">Table of n, a(n) for n = 1..10000</a> %t A382412 Select[Range[100], DigitCount[#, 7, 0] == 0 &] %Y A382412 Cf. zeroless numbers in other bases: A126646 (base 2), A032924 (base 3), A023705 (base 4), A023721 (base 5), A248910 (base 6), A255805 (base 8), A255808 (base 9), A052382 (base 10). %Y A382412 Cf. A007093, A043393, A249102, A382413 (complement). %K A382412 nonn,base,easy %O A382412 1,2 %A A382412 _Paolo Xausa_, Mar 24 2025