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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 (list; graph; refs; listen; history; text; internal format)
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: A200870 A234690 A234683 * A327831 A234682 A156391

Adjacent sequences:  A238916 A238917 A238918 * A238920 A238921 A238922

KEYWORD

nonn

AUTHOR

Joerg Arndt and Alois P. Heinz, Mar 07 2014

STATUS

approved

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Last modified October 17 17:21 EDT 2021. Contains 348065 sequences. (Running on oeis4.)