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A180395 Number of permutations of 1..n with both permutation and its inverse having exactly 5 maxima 1
0, 0, 0, 0, 0, 0, 0, 0, 213, 38970, 2199243, 66436204, 1334964325, 20003126222, 239548888455 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,9

LINKS

Table of n, a(n) for n=1..15.

CROSSREFS

Sequence in context: A201342 A092796 A280898 * A242793 A335721 A242804

Adjacent sequences:  A180392 A180393 A180394 * A180396 A180397 A180398

KEYWORD

nonn

AUTHOR

R. H. Hardin Sep 01 2010

STATUS

approved

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Last modified May 21 05:37 EDT 2022. Contains 353889 sequences. (Running on oeis4.)