login
The OEIS Foundation is supported by donations from users of the OEIS and by a grant from the Simons Foundation.

 

Logo


Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A183267 Number of singly defective permutations of 1..n+6 with exactly 4 maxima. 2
4760, 199168, 4643712, 80506880, 1163431808, 14874150912, 174293203968, 1915121868800, 20041282099200, 201949448765440, 1975285587312640, 18866258297487360, 176760773333450752, 1630252849810636800, 14841729785246515200, 133664316735891701760, 1192882240528106127360 (list; graph; refs; listen; history; text; internal format)
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=2 with 4 maxima:

(7,5,3,6,1,5,2,8) (7,1,8,4,3,4,2,6) (6,3,7,2,8,3,5,4) (6,1,5,2,4,3,3,7).

CROSSREFS

Column 4 of A183270.

Sequence in context: A083638 A237553 A250467 * A258231 A257763 A260293

Adjacent sequences:  A183264 A183265 A183266 * A183268 A183269 A183270

KEYWORD

nonn

AUTHOR

R. H. Hardin, Jan 03 2011

EXTENSIONS

Terms a(10) and beyond from Andrew Howroyd, May 12 2020

STATUS

approved

Lookup | Welcome | Wiki | Register | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Style Sheet | Transforms | Superseeker | Recent
The OEIS Community | Maintained by The OEIS Foundation Inc.

License Agreements, Terms of Use, Privacy Policy. .

Last modified May 17 21:11 EDT 2021. Contains 343990 sequences. (Running on oeis4.)