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 A225438 #4 May 08 2013 16:24:39
%S A225438 1,9,15,21,25,27,33,39,45,49,51,55,57,63,65,69,75,77,81,85,87,93,99,
%T A225438 105,111,117,123,129,135,141,147,153,155,159,161,165,171,177,183,185,
%U A225438 187,189,195,201,205,207,213,219,221,225,231,237,243,245,247,249
%N A225438 Odd numbers such that no permutation of its digits yields a prime.
%C A225438 Subset of A067013.
%e A225438 105 is a member since none of 105, 150, 15, 51, 510, 501 is a prime.
%t A225438 t={}; Do[If[Length[Select[Table[FromDigits[k], {k,Permutations[IntegerDigits[n]]}],PrimeQ]]==0, AppendTo[t,n]], {n,1,250,2}]; t
%Y A225438 Cf. A067013.
%K A225438 nonn,base
%O A225438 1,2
%A A225438 _Jayanta Basu_, May 08 2013