A151643 - OEIS

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A151643

Number of permutations of 4 indistinguishable copies of 1..n with exactly 5 adjacent element pairs in decreasing order.

0, 8464, 15018688, 6501577152, 1585757994496, 290861341616496 (list; graph; refs; listen; history; internal format)

	OFFSET	`2,2`
	CROSSREFS	`Sequence in context: A046336 A046384 A170787 * A031680 A031590 A188214` `Adjacent sequences: A151640 A151641 A151642 * A151644 A151645 A151646`
	KEYWORD	`nonn`
	AUTHOR	`R. H. Hardin (rhhardin(AT)att.net) May 29 2009`

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Last modified February 17 19:13 EST 2012. Contains 206085 sequences.