A151596 Number of permutations of 3 indistinguishable copies of 1..n arranged in a circle with exactly 8 adjacent element pairs in decreasing order.

0, 720, 22306500, 44859920256, 30335281455906, 11524809684506112

Offset

3,2

Links

Table of n, a(n) for n=3..8.

Crossrefs

Sequence in context: A008979 A158044 A181751 * A068300 A003792 A208192

Adjacent sequences: A151593 A151594 A151595 * A151597 A151598 A151599

Keyword

nonn

Author

R. H. Hardin May 21 2009

Status

approved