A183266 Number of singly defective permutations of 1..n+4 with exactly 3 maxima.

120, 3552, 57064, 681984, 6849792, 61486080, 511006848, 4019699712, 30364991488, 222472642560, 1592011745280, 11183547482112, 77409364082688, 529414815744000, 3585105638490112, 24077527815290880, 160571745918517248, 1064387288330403840, 7018456956044574720

Offset

1,1

Comments

A singly defective permutation omits one value and repeats another value.

Links

Andrew Howroyd, Table of n, a(n) for n = 1..200

Example

Some solutions for n=3 with 3 maxima:
(2,5,3,4,3,1,7) (2,1,7,4,3,6,2) (4,2,6,5,7,4,3) (4,3,3,7,2,5,1).

Crossrefs

Column 3 of A183270.

Sequence in context: A060490 A158048 A219477 * A231129 A052722 A282612

Adjacent sequences: A183263 A183264 A183265 * A183267 A183268 A183269

Keyword

nonn

Author

R. H. Hardin, Jan 03 2011

Extensions

Terms a(12) and beyond from Andrew Howroyd, May 12 2020

Status

approved