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 A239079 #6 Mar 10 2014 13:17:48 %S A239079 1,1,2,4,10,26,76,232,764,2388,7280,21574,63162,183286,531576,1545583, %T A239079 4523049,13283748,39091824,115105436,338866164,996931680,2930722336, %U A239079 8610252768,25290067376,74279609504,218185834860,640968565724,1883199406468,5533359251576 %N A239079 Number of self-inverse permutations p on [n] with displacement of elements restricted by 7: |p(i)-i| <= 7. %H A239079 Joerg Arndt and Alois P. Heinz, <a href="/A239079/b239079.txt">Table of n, a(n) for n = 0..1000</a> %Y A239079 Column k=7 of A238888. %Y A239079 Cf. A000085. %K A239079 nonn %O A239079 0,3 %A A239079 _Joerg Arndt_ and _Alois P. Heinz_, Mar 10 2014