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A151576 Number of permutations of 1..n arranged in a circle with exactly 3 adjacent element pairs in decreasing order. 0
0, 4, 55, 396, 2114, 9528, 38637, 146080, 526240, 1831644, 6217523, 20716164, 68059710, 221195824, 712856665 (list; graph; refs; listen; history; text; internal format)
OFFSET

3,2

COMMENTS

Exactly 2 adjacent element pairs in decreasing order gives A027540(n-1)

LINKS

Table of n, a(n) for n=3..17.

CROSSREFS

Related sequences: A151577-A151610.

Sequence in context: A064439 A133218 A190441 * A204107 A285366 A202163

Adjacent sequences:  A151573 A151574 A151575 * A151577 A151578 A151579

KEYWORD

nonn

AUTHOR

R. H. Hardin May 21 2009

STATUS

approved

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Last modified August 20 20:34 EDT 2018. Contains 313927 sequences. (Running on oeis4.)