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 A140175 #4 Jul 14 2012 13:52:01
%S A140175 4621,34361,2881861,63882851
%N A140175 Numbers n such that n=prime((d_1*d_2*...*d_k)*(d_1+d_2+...+d_k)) where d_1d_2...d_k is the decimal expansion of n.
%e A140175 63882851=prime((6*3*8*8*2*8*5*1)*(6+3+8+8+2+8+5+1)).
%t A140175 fQ[n_] := Block[{id = IntegerDigits@ n}, n == Prime[Plus @@ id Times @@ id]]; k = 1; lst = {}; While[ k < 10^8, If[ fQ@n, AppendTo[lst, k]; Print@ n]; k++ ]; lst (* _Robert G. Wilson v_ *)
%Y A140175 Cf. A097223.
%K A140175 base,nonn
%O A140175 1,1
%A A140175 _Farideh Firoozbakht_, Jun 09 2008