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A151636 Number of permutations of 3 indistinguishable copies of 1..n with exactly 6 adjacent element pairs in decreasing order. 0
0, 1, 49682, 58571184, 21475242671, 4476844162434, 678770257169016 (list; graph; refs; listen; history; internal format)
OFFSET

2,3

CROSSREFS

Sequence in context: A185921 A187856 A081636 * A023944 A159233 A145538

Adjacent sequences:  A151633 A151634 A151635 * A151637 A151638 A151639

KEYWORD

nonn

AUTHOR

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

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Last modified February 16 04:47 EST 2012. Contains 205860 sequences.