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 A376088 #12 Sep 14 2024 06:46:22 %S A376088 3,6,7,9,12,14,15,18,22,24,26,28,30,35,36,44,45,54,55,56,60,65,66,70, %T A376088 72,74,75,82,88,90,104,108,112,120,132,140,144,148,150,175,176,180, %U A376088 216,220,224,225,240,252,260,264,275,280,288,292,296,300,308,350,360 %N A376088 Positive numbers k such that in the decimal expansion of 1/k a nonzero digit is never followed by a zero. %C A376088 Or numbers k such that 1/k has only one (infinite) run of (leading) zeros. %C A376088 Or numbers k such that 1/k has only one infinite run of nonzero digits (considering that reciprocals of terms of A003592 end with 0's). %C A376088 This sequence is infinite: if m is a term, then 10*m is also a term. %H A376088 Rémy Sigrist, <a href="/A376088/b376088.txt">Table of n, a(n) for n = 1..10000</a> %H A376088 Rémy Sigrist, <a href="/A376088/a376088.gp.txt">PARI program</a> %H A376088 Rémy Sigrist, <a href="/A376088/a376088.txt">C++ program</a> %H A376088 <a href="/index/1#1overn">Index entries for sequences related to decimal expansion of 1/n</a> %e A376088 The first terms, alongside their reciprocal (with the repeating part between parentheses), are: %e A376088 n a(n) 1/a(n) %e A376088 -- ---- ------------ %e A376088 1 3 0.(3) %e A376088 2 6 0.1(6) %e A376088 3 7 0.(142857) %e A376088 4 9 0.(1) %e A376088 5 12 0.08(3) %e A376088 6 14 0.0(714285) %e A376088 7 15 0.0(6) %e A376088 8 18 0.0(5) %e A376088 9 22 0.0(45) %e A376088 10 24 0.041(6) %e A376088 11 26 0.0(384615) %e A376088 12 28 0.03(571428) %e A376088 13 30 0.0(3) %e A376088 14 35 0.0(285714) %e A376088 15 36 0.02(7) %o A376088 (PARI) \\ See Links section. %o A376088 (C++) // See Links section. %Y A376088 Cf. A003592, A052382, A060284. %K A376088 nonn,base %O A376088 1,1 %A A376088 _Rémy Sigrist_, Sep 09 2024