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 A233027 #12 Dec 05 2013 06:20:57 %S A233027 0,0,1,2,2,4,2,6,4,6,3,8,2,7,3,4,4,7,2,7,8,3,9,15,7,14,9,10,9,15,6,15, %T A233027 8,16,11,17,8,23,11,15,16,23,8,23,18,18,19,31,13,27,20,19,14,31,10,36, %U A233027 17,24,19,39,16,39,24,22,25,33,18,47,28,31,18,47,15 %N A233027 a(n) is number of nonnegative integers not exceeding n which have no decimal digits occurring in n and respectively prime to n. %H A233027 Peter J. C. Moses, <a href="/A233027/b233027.txt">Table of n, a(n) for n = 0..9999</a> %e A233027 Let n=12. Numbers which are prime to 12 are 1,5,7,11. However, 1 and 11 are not acceptable by the condition. So, a(12)=2. %Y A233027 Cf. A000010, A232897. %K A233027 nonn,base %O A233027 0,4 %A A233027 _Vladimir Shevelev_, Dec 03 2013 %E A233027 More terms from _Peter J. C. Moses_