login
This site is supported by donations to The OEIS Foundation.

 

Logo


Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A179265 Number of permutations of 1..n with sum (i-p(i))^2 < n*(n-1)/2 0
0, 1, 3, 5, 21, 87, 350, 1399, 6689, 36711, 196510, 1037354, 6147299, 40106433, 256572630, 1621282565, 11156001505, 82732094377, 603846490132, 4357719350552, 33658109397606, 276421527541533 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,3

LINKS

Table of n, a(n) for n=1..22.

CROSSREFS

Sequence in context: A189560 A216385 A247680 * A084253 A153889 A186751

Adjacent sequences:  A179262 A179263 A179264 * A179266 A179267 A179268

KEYWORD

nonn

AUTHOR

R. H. Hardin Jul 06 2010

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 October 23 14:11 EDT 2019. Contains 328345 sequences. (Running on oeis4.)