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Number of self-inverse permutations p on [n] with displacement of elements restricted by 8: |p(i)-i| <= 8.
2

%I #6 Mar 10 2014 13:16:30

%S 1,1,2,4,10,26,76,232,764,2620,8732,28068,88448,273590,839026,2559590,

%T 7810344,23899859,73552737,227149812,702978992,2177474284,6745619532,

%U 20888771872,64643999584,199916632224,617935452464,1909553806592,5900616453456,18234154867712

%N Number of self-inverse permutations p on [n] with displacement of elements restricted by 8: |p(i)-i| <= 8.

%H Joerg Arndt and Alois P. Heinz, <a href="/A239080/b239080.txt">Table of n, a(n) for n = 0..1000</a>

%Y Column k=8 of A238888.

%Y Cf. A000085.

%K nonn

%O 0,3

%A _Joerg Arndt_ and _Alois P. Heinz_, Mar 10 2014