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A151604
Number of permutations of 5 indistinguishable copies of 1..n arranged in a circle with exactly 3 adjacent element pairs in decreasing order.
0
0, 120, 23580, 1041140, 31611675, 836679060
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OFFSET
1,2
LINKS
Table of n, a(n) for n=1..6.
CROSSREFS
Sequence in context:
A105188
A264957
A270604
*
A104008
A278726
A227667
Adjacent sequences:
A151601
A151602
A151603
*
A151605
A151606
A151607
KEYWORD
nonn
AUTHOR
R. H. Hardin
May 21 2009
STATUS
approved
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Last modified July 8 08:41 EDT 2024. Contains 374148 sequences. (Running on oeis4.)