A180396 - OEIS

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, 3717, 1167268, 108778518, 5265259064, 165412392895 (list; graph; refs; listen; history; text; internal format)

	OFFSET	`1,11`
	LINKS	`Table of n, a(n) for n=1..15.`
	CROSSREFS	`Sequence in context: A179623 A263035 A252161 * A158917 A252421 A296908` `Adjacent sequences: A180393 A180394 A180395 * A180397 A180398 A180399`
	KEYWORD	`nonn`
	AUTHOR	`R. H. Hardin Sep 01 2010`
	STATUS	`approved`

Last modified February 8 15:28 EST 2023. Contains 360149 sequences. (Running on oeis4.)