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A151657 Number of permutations of 7 indistinguishable copies of 1..n with exactly 3 adjacent element pairs in decreasing order. 0
0, 1225, 818300, 160310458, 22727054364, 2892619063243 (list; graph; refs; listen; history; internal format)
OFFSET

1,2

CROSSREFS

Sequence in context: A025405 A183665 A014795 * A046177 A031748 A031623

Adjacent sequences:  A151654 A151655 A151656 * A151658 A151659 A151660

KEYWORD

nonn

AUTHOR

R. H. Hardin (rhhardin(AT)att.net) May 29 2009

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Last modified February 15 23:53 EST 2012. Contains 205860 sequences.