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A151591 Number of permutations of 3 indistinguishable copies of 1..n arranged in a circle with exactly 3 adjacent element pairs in decreasing order. 0
0, 2, 732, 22360, 386375, 5339202, 66391738, 781132256 (list; graph; refs; listen; history; internal format)
OFFSET

1,2

CROSSREFS

Sequence in context: A090565 A072384 A109949 * A145124 A102969 A179960

Adjacent sequences:  A151588 A151589 A151590 * A151592 A151593 A151594

KEYWORD

nonn

AUTHOR

R. H. Hardin (rhhardin(AT)att.net) May 21 2009

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Last modified February 17 02:48 EST 2012. Contains 205978 sequences.