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A238918 Number of self-inverse permutations p on [n] where the maximal displacement of an element equals 7. 2

%I #5 Mar 08 2014 03:32:31

%S 0,0,0,0,0,0,0,0,76,438,1846,6664,22322,71223,221747,685899,2133273,

%T 6639848,20631028,63857132,196698620,602652416,1837237916,5577247428,

%U 16876196404,50936285192,153419520771,461274617487,1384650408582,4150200289940,12421725164955

%N Number of self-inverse permutations p on [n] where the maximal displacement of an element equals 7.

%H Joerg Arndt and Alois P. Heinz, <a href="/A238918/b238918.txt">Table of n, a(n) for n = 0..750</a>

%e a(8) = 76: 82345671, 82345761, 82346571, 82347651, ..., 87543621, 87563421, 87645321, 87654321.

%Y Column k=7 of A238889.

%K nonn

%O 0,9

%A _Joerg Arndt_ and _Alois P. Heinz_, Mar 07 2014

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Last modified June 7 22:01 EDT 2024. Contains 373206 sequences. (Running on oeis4.)