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A180396
Number of permutations of 1..n with both permutation and its inverse having exactly 6 maxima
0
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 3717, 1167268, 108778518, 5265259064, 165412392895
OFFSET
1,11
CROSSREFS
Sequence in context: A179623 A263035 A252161 * A158917 A252421 A296908
KEYWORD
nonn
AUTHOR
R. H. Hardin Sep 01 2010
STATUS
approved