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 A353442 #17 Jul 01 2023 16:54:23 %S A353442 6,13,15,16,17,19,21,23,24,26,29,31,34,38,39,46,47,49,51,52,53,57,58, %T A353442 59,60,61,62,64,65,68,69,71,73,76,79,81,83,84,85,86,87,88,89,92,93,94, %U A353442 95,96,97,98,102,103,104,106,107,109,113,114,115,116,118,119,121,122,124,126 %N A353442 Integers m such that the decimal expansion of 1/m contains the digit 6. %C A353442 If m is a term, 10*m is also a term, so terms with no trailing zeros are all primitive terms. %H A353442 <a href="/index/1#1overn">Index entries for sequences related to decimal expansion of 1/n</a>. %e A353442 m = 6 is a term since 1/6 = 0.16666666666... %e A353442 m = 13 is a term since 1/13 = 0.076923076923... %e A353442 m = 103125 is a term since 1/103125 = 0.00000969696... %t A353442 f[n_] := Union[ Flatten[ RealDigits[ 1/n][[1]] ]]; Select[ Range@ 150, MemberQ[f@#, 6] &] %Y A353442 A351472 (largest digit=6) and A352160 (smallest digit=6) are subsequences. %Y A353442 Similar with digit k: A352154 (k=0), A353437 (k=1), A353438 (k=2), A353439 (k=3), A353440 (k=4), A353441 (k=5), this sequence (k=6), A353443 (k=7), A353444 (k=8), A333237 (k=9). %K A353442 nonn,base %O A353442 1,1 %A A353442 _Bernard Schott_ and _Robert G. Wilson v_, Apr 25 2022