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A151653 Number of permutations of 6 indistinguishable copies of 1..n with exactly 4 adjacent element pairs in decreasing order. 0
0, 225, 1424925, 879018750, 286691702976, 73088118705987 (list; graph; refs; listen; history; internal format)
OFFSET

1,2

CROSSREFS

Sequence in context: A109688 A195277 A013757 * A077729 A077737 A068123

Adjacent sequences:  A151650 A151651 A151652 * A151654 A151655 A151656

KEYWORD

nonn

AUTHOR

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

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Last modified February 17 02:08 EST 2012. Contains 205978 sequences.