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 A323800 #8 Jan 28 2019 10:46:25
%S A323800 0,42,274,1227,4833,18827,75693,304900,1212960,4753020,18410363,
%T A323800 70943107,272701262,1046410914,4007815161,15319362279,58456445860,
%U A323800 222775782355,848216866767,3227396592600,12273205919568,46650941505906,177252609519698,673266690295879
%N A323800 Number of permutations p of [n] such that max_{j=1..n} |p(j)-j| = 4.
%H A323800 Alois P. Heinz, <a href="/A323800/b323800.txt">Table of n, a(n) for n = 4..1000</a>
%F A323800 a(n) = A072856(n) - A002526(n).
%Y A323800 Column k=4 of A130152.
%Y A323800 Cf. A002526, A072856.
%K A323800 nonn,easy
%O A323800 4,2
%A A323800 _Alois P. Heinz_, Jan 28 2019