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 A069715 #12 Feb 13 2017 02:17:07 %S A069715 1,10,11,12,13,14,15,16,17,18,19,21,23,25,27,29,31,32,34,35,37,38,41, %T A069715 43,45,47,49,51,52,53,54,56,57,58,59,61,65,67,71,72,73,74,75,76,78,79, %U A069715 81,83,85,87,89,91,92,94,95,97,98,100,101,102,103,104,105,106,107,108 %N A069715 GCD of digits of n is 1. %H A069715 Reinhard Zumkeller, <a href="/A069715/b069715.txt">Table of n, a(n) for n = 1..10000</a> %H A069715 <a href="/index/Ar#10-automatic">Index entries for 10-automatic sequences</a>. %F A069715 A052423(a(n)) = 1. - _Reinhard Zumkeller_, Apr 14 2014 %F A069715 a(n) ~ n. In fact a(n) = n + O(n^(log 5/log 10)). - _Charles R Greathouse IV_, Nov 01 2014 %e A069715 All numbers with at least one digit equal to 1 are here. %t A069715 Do[s=Apply[GCD, IntegerDigits[n]]; If[Equal[s, 1], Print[n]], {n, 1, 256}] %o A069715 (Haskell) %o A069715 a069715 n = a069715_list !! (n-1) %o A069715 a069715_list = filter ((== 1) . a052423) [1..] %o A069715 -- _Reinhard Zumkeller_, Apr 14 2014 %o A069715 (PARI) is(n)=gcd(digits(n))==1 \\ _Charles R Greathouse IV_, Nov 01 2014 %Y A069715 Cf. A011531 (subsequence), A240913 (subsequence). %K A069715 base,easy,nonn %O A069715 1,2 %A A069715 _Labos Elemer_, Apr 02 2002