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A151597 Number of permutations of 4 indistinguishable copies of 1..n arranged in a circle with exactly 2 adjacent element pairs in decreasing order. 0
0, 36, 606, 4744, 30850, 186924, 1092966, 6248976 (list; graph; refs; listen; history; internal format)
OFFSET

1,2

CROSSREFS

Sequence in context: A183356 A099764 A003841 * A126926 A163720 A129839

Adjacent sequences:  A151594 A151595 A151596 * A151598 A151599 A151600

KEYWORD

nonn

AUTHOR

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

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Last modified February 17 09:30 EST 2012. Contains 206009 sequences.