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 A259779 #11 Jul 19 2015 19:29:47 %S A259779 1,0,1,2,9,44,265,1854,10860,55314,259285,1178912,5382017,25157980, %T A259779 121727936,598440744,2954197380,14540741660,71135825805,345881286126, %U A259779 1675123912129,8108391695252,39291412775944,190687692089500,926601640342609,4505656310652572 %N A259779 Number of permutations p of [n] with no fixed points and displacement of elements restricted by six: 1 <= |p(i)-i| <= 6. %H A259779 Alois P. Heinz, <a href="/A259779/b259779.txt">Table of n, a(n) for n = 0..1000</a> %H A259779 Vaclav Kotesovec, <a href="/A259779/a259779.txt">Recurrence (of order 494) and g.f.</a> %Y A259779 Column k=6 of A259776. %Y A259779 Cf. A260111. %K A259779 nonn %O A259779 0,4 %A A259779 _Alois P. Heinz_, Jul 05 2015