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A238919
Number of self-inverse permutations p on [n] where the maximal displacement of an element equals 8.
2
0, 0, 0, 0, 0, 0, 0, 0, 0, 232, 1452, 6494, 25286, 90304, 307450, 1014007, 3287295, 10616111, 34460913, 112044376, 364112828, 1180542604, 3814897196, 12278519104, 39353932208, 125637022720, 399749617604, 1268585240868, 4017417046988, 12700795616136
OFFSET
0,10
LINKS
Joerg Arndt and Alois P. Heinz, Table of n, a(n) for n = 0..750
EXAMPLE
a(9) = 232: 923456781, 923456871, 923457681, 923458761, ..., 987456321, 987465321, 987546321, 987654321.
CROSSREFS
Column k=8 of A238889.
Sequence in context: A234690 A234683 A366816 * A327831 A234682 A156391
KEYWORD
nonn
AUTHOR
Joerg Arndt and Alois P. Heinz, Mar 07 2014
STATUS
approved