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 A155474 #4 Mar 30 2012 18:52:32 %S A155474 1,9,15,21,25,27,33,35,39,45,49,51,55,57,63,65,69,75,77,85,87,91,93, %T A155474 95,99,105,111,117,119,123,129,143,145,147,153,155,159,161,165,169, %U A155474 171,175,177,183,185,201,203,205,207,209,213,225,235,237,243,245,247,249,253 %N A155474 Odd nonprimes n with distinct smallest digits of n and n-th prime. %e A155474 If n=1=odd nonprime and 2=prime(1), then 1<2 and 1=a(1). If n=9=odd nonprime and 23=prime(9), then 9>2 and 9=a(2). If n=15=odd nonprime and 47=prime(15), then 1<4 and 15=a(3), etc. %Y A155474 Cf. A000027, A000040, A014076. %K A155474 nonn,base %O A155474 1,2 %A A155474 _Juri-Stepan Gerasimov_, Jan 23 2009 %E A155474 Corrected (89 removed) by _R. J. Mathar_, May 10 2010