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Number of self-inverse permutations p on [n] with displacement of elements restricted by 10: |p(i)-i| <= 10.
2

%I #8 Nov 01 2014 20:20:06

%S 1,1,2,4,10,26,76,232,764,2620,9496,35696,130656,464036,1615276,

%T 5517828,18628384,62330046,207657610,690610926,2299356168,7678084407,

%U 25759043565,86697055428,292427968880,987581324508,3337168641756,11277361448224,38099089805120

%N Number of self-inverse permutations p on [n] with displacement of elements restricted by 10: |p(i)-i| <= 10.

%H Joerg Arndt and Alois P. Heinz, <a href="/A239082/b239082.txt">Table of n, a(n) for n = 0..1000</a>

%Y Column k=10 of A238888.

%Y Cf. A000085.

%K nonn

%O 0,3

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