A151593 Number of permutations of 3 indistinguishable copies of 1..n arranged in a circle with exactly 5 adjacent element pairs in decreasing order.

0, 117, 149520, 26591700, 2321730306, 143576370000, 7341810391656

Offset

2,2

Links

Table of n, a(n) for n=2..8.

Crossrefs

Sequence in context: A194613 A079196 A113798 * A263425 A066923 A039556

Adjacent sequences: A151590 A151591 A151592 * A151594 A151595 A151596

Keyword

nonn

Author

R. H. Hardin May 21 2009

Status

approved