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URL: https://oeis.org/A180395

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A180395
Number of permutations of 1..n with both permutation and its inverse having exactly 5 maxima.
0
0, 0, 0, 0, 0, 0, 0, 0, 213, 38970, 2199243, 66436204, 1334964325, 20003126222, 239548888455
OFFSET
1,9
CROSSREFS
Sequence in context: A201342 A092796 A280898 * A242793 A335721 A242804
KEYWORD
nonn
AUTHOR
R. H. Hardin, Sep 01 2010
STATUS
approved