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 A180679 #21 Nov 21 2013 12:50:05
%S A180679 3311,27181,32153,41237,53977,86507,110971,125069,208579,256413,
%T A180679 500981,543337,853811,901949,964481,1053787,1144171,1197851,1215731,
%U A180679 1344539,1385189,1433659,1549603,1674741,1681547,1699481,1973479,2028181
%N A180679 Numbers with three distinct prime factors which when concatenated in any order form prime numbers.
%C A180679 The sequence admits only numbers with three distinct prime factors. A denser sequence (a superset) is obtained if prime factors may be repeated. [From _R. J. Mathar_, Oct 03 2010]
%C A180679 There is no term with four distinct prime factors under 10^8. [From _Dmitri Kamenetsky_, Sep 29 2012]
%e A180679 For 3311, 3311=7 * 11 * 43, and 71143, 74311, 43711, 43117, 11437, 11743 are all prime numbers.
%t A180679 Take[Union[Times @@@ Select[Subsets[Prime[Range[300]], {3}], And @@ PrimeQ[FromDigits /@ (Flatten /@ (IntegerDigits /@ Permutations[#]))] &]], 30] (* _Harvey P. Dale_, Jan 29 2011 *)
%Y A180679 Cf. A181559, A217263, A217264, A217265.
%K A180679 nonn,base
%O A180679 1,1
%A A180679 _James Farrington_, Sep 15 2010
%E A180679 Missing values inserted by _R. J. Mathar_, Oct 03 2010