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A151608
Number of permutations of 6 indistinguishable copies of 1..n arranged in a circle with exactly 3 adjacent element pairs in decreasing order.
0
0, 400, 78900, 4232384, 164553580, 5706469776
OFFSET
1,2
CROSSREFS
Sequence in context: A187051 A231288 A210262 * A022232 A151652 A197441
KEYWORD
nonn
AUTHOR
R. H. Hardin May 21 2009
STATUS
approved