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 A259780 #11 Jul 19 2015 19:31:40 %S A259780 1,0,1,2,9,44,265,1854,14833,101976,619009,3449752,18376224,96559908, %T A259780 511111965,2761247612,15348014345,86603917480,491567055577, %U A259780 2789697424330,15773859067112,88743605142976,496953313619236,2774429422110882,15478834487896593 %N A259780 Number of permutations p of [n] with no fixed points and displacement of elements restricted by seven: 1 <= |p(i)-i| <= 7. %C A259780 Conjectured recurrence order is 1780. - _Vaclav Kotesovec_, Jul 07 2015 %H A259780 Alois P. Heinz, <a href="/A259780/b259780.txt">Table of n, a(n) for n = 0..1000</a> %Y A259780 Column k=7 of A259776. %Y A259780 Cf. A260091. %K A259780 nonn %O A259780 0,4 %A A259780 _Alois P. Heinz_, Jul 05 2015