login
A151600
Number of permutations of 4 indistinguishable copies of 1..n arranged in a circle with exactly 5 adjacent element pairs in decreasing order.
0
0, 11640, 10421120, 2396959400, 324776205024, 34107115135800
OFFSET
2,2
CROSSREFS
Sequence in context: A250242 A231321 A154053 * A214804 A352330 A203821
KEYWORD
nonn
AUTHOR
R. H. Hardin May 21 2009
STATUS
approved