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A151607 Number of permutations of 6 indistinguishable copies of 1..n arranged in a circle with exactly 2 adjacent element pairs in decreasing order. 0
0, 150, 2763, 28236, 251205, 2116386 (list; graph; refs; listen; history; internal format)
OFFSET

1,2

CROSSREFS

Sequence in context: A184665 A088361 A206041 * A135968 A135969 A128963

Adjacent sequences:  A151604 A151605 A151606 * A151608 A151609 A151610

KEYWORD

nonn

AUTHOR

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

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Last modified February 17 04:33 EST 2012. Contains 205978 sequences.