A238919 Number of self-inverse permutations p on [n] where the maximal displacement of an element equals 8.

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

Adjacent sequences: A238916 A238917 A238918 * A238920 A238921 A238922

Keyword

nonn

Author

Joerg Arndt and Alois P. Heinz, Mar 07 2014

Status

approved