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 A177353 #19 May 22 2015 19:45:44
%S A177353 1,2,6,7,16,17,40,20,30,72,108,45,20,188,206,115,240,0,12,266,0,355,
%T A177353 440,17,612,271,260,485,302,459,884,750,930,936,1064,1088,860,0,196,
%U A177353 1430,1218,1725,0,143,916,870,0,1990,2024,2419,2,2610,2770,1355,2040,99,0,465,310,2015
%N A177353 n! (mod n^2+1).
%C A177353 a(n)=0 if n is in A120416. - _Ivan Neretin_, May 22 2015
%H A177353 Ivan Neretin, <a href="/A177353/b177353.txt">Table of n, a(n) for n = 1..10000</a>
%t A177353 Table[Mod[n!, n^2 + 1], {n, 60}]
%Y A177353 Cf. A131451, A002522, A120416.
%K A177353 nonn
%O A177353 1,2
%A A177353 _Vladimir Shevelev_, Dec 18 2010