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 A323805 #8 Jan 28 2019 18:24:06
%S A323805 0,685440,11123280,124658640,1166388360,9804325176,77191636698,
%T A323805 585120530242,4352418785279,32202026068621,240183024181127,
%U A323805 1821246237562657,13946936520272756,107314021044232924,826507136709547152,6354476077005199296,48686592289143593088
%N A323805 Number of permutations p of [n] such that max_{j=1..n} |p(j)-j| = 9.
%H A323805 Alois P. Heinz, <a href="/A323805/b323805.txt">Table of n, a(n) for n = 9..400</a>
%F A323805 a(n) = A154658(n) - A154657(n).
%Y A323805 Column k=9 of A130152.
%Y A323805 Cf. A154657, A154658.
%K A323805 nonn
%O A323805 9,2
%A A323805 _Alois P. Heinz_, Jan 28 2019