A151628 - OEIS

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A151628

Number of permutations of 2 indistinguishable copies of 1..n with exactly 6 adjacent element pairs in decreasing order.

0, 1, 5158, 1822014, 242384856, 19323413187, 1130781824398, 54076536713976 (list; graph; refs; listen; history; internal format)

	OFFSET	`3,3`
	CROSSREFS	`Sequence in context: A186968 A195648 A188338 * A073585 A107344 A184000` `Adjacent sequences: A151625 A151626 A151627 * A151629 A151630 A151631`
	KEYWORD	`nonn`
	AUTHOR	`R. H. Hardin (rhhardin(AT)att.net) May 29 2009`

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Last modified February 15 15:20 EST 2012. Contains 205823 sequences.