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 A139205 #10 Dec 23 2016 21:44:44
%S A139205 5,6,7,11,13,17,28,81,87,433,640,647,798,1026,1216,1277,3825,6684
%N A139205 Numbers k such that (k!-10)/10 is prime.
%C A139205 a(19) > 25000. - _Robert Price_, Dec 23 2016
%t A139205 a = {}; Do[If[PrimeQ[(n! - 10)/10], Print[a]; AppendTo[a, n]], {n, 1, 300}]; a (*Artur Jasinski*)
%t A139205 Select[Range[700],PrimeQ[(#!-10)/10]&] (* _Harvey P. Dale_, Feb 15 2015 *)
%Y A139205 Cf. A139189, A139190, A139191, A139192, A139193, A139194, A139195, A139196, A139197, A139198.
%Y A139205 Cf. n!/m-1 is a prime: A002982, A082671, A139056, A139199-A139205; n!/m+1 is a prime: A002981, A082672, A089085, A139061, A139058, A139063, A139065, A151913, A137390, A139071 (1<=m<=10).
%K A139205 hard,more,nonn
%O A139205 1,1
%A A139205 _Artur Jasinski_, Apr 11 2008
%E A139205 One additional term (a(12)) from _Harvey P. Dale_, Feb 15 2015
%E A139205 More terms from _Serge Batalov_, Feb 18 2015
%E A139205 a(18) from _Robert Price_, Dec 23 2016