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Search: id:A151590
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A151590 Number of permutations of 3 indistinguishable copies of 1..n arranged in a circle with exactly 2 adjacent element pairs in decreasing order. +0
1
0, 12, 207, 1392, 7455, 36540, 171591, 785856 (list; graph; listen)
OFFSET

1,2
CROSSREFS

Sequence in context: A108020 A097193 A051688 this_sequence A127909 A129466 A027399

Adjacent sequences: A151587 A151588 A151589 this_sequence A151591 A151592 A151593

KEYWORD

nonn

AUTHOR

Ron Hardin (rhhardin(AT)att.net) May 21 2009

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Last modified December 9 14:43 EST 2009. Contains 170430 sequences.

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