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 A139193 #6 Oct 03 2015 23:17:30
%S A139193 23,1007,7983359,1245404159,71137485619199,24329020081766399,
%T A139193 5170403347776995327999,1768352398747940390908723199999,
%U A139193 1644567730835584563545112575999999
%N A139193 Natural numbers of the form (prime(n)! - 5)/5.
%p A139193 A039716 := proc(n) factorial(ithprime(n)) ; end: A139193 := proc(n) A039716(n)/5-1 ; end: seq(A139193(n),n=3..14) ; # _R. J. Mathar_, Sep 18 2009
%t A139193 Table[(Prime[n]! - 5)/5, {n, 3, 20}]
%Y A139193 Cf. A139189, A139190, A139191, A139192, A139193, A139194, A139195, A139196, A139197, A139198.
%K A139193 nonn
%O A139193 1,1
%A A139193 _Artur Jasinski_, Apr 11 2008