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 A275276 #13 Jul 26 2016 02:47:37
%S A275276 6,7,4,7,13,19,19,43,29,23,43,17,67,43,71,89,239,47,197,151,43,139,
%T A275276 197,191,239,191,173,197,47,97,223,373,71,439,307,263,157,241,199,233,
%U A275276 337,131,179,149,113,277,269,409,197,193,379,271,181,419,367,701,751
%N A275276 a(n) = n! - p, where p is the third greatest prime less than n!.
%C A275276 Is every term except 4 and 6 a prime?
%H A275276 Clark Kimberling, <a href="/A275276/b275276.txt">Table of n, a(n) for n = 1..300</a>
%e A275276 For n = 4, we have n! = 24, so that p = 17, and a(4) = 7.
%t A275276 Table[n! - NextPrime[n!, -3], {n, 1, 150}]
%Y A275276 Cf. A275272, A000040.
%K A275276 nonn,easy
%O A275276 1,1
%A A275276 _Clark Kimberling_, Jul 23 2016
%E A275276 Name corrected by _Pavel Irzhavski_, Jul 25 2016