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!)
A189428 Number of n X n array permutations with each element not moving, or moving one space N, SW or SE 0
1, 2, 9, 140, 5680, 606201, 181540773, 150293731826, 343426652577376 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

Diagonal of A189435

LINKS

Table of n, a(n) for n=1..9.

EXAMPLE

Some solutions for 3X3

..0..4..2....0..1..2....0..1..2....0..1..2....0..1..5....0..4..5....3..1..2

..3..7..1....3..4..5....6..7..5....3..7..8....3..2..8....3..2..1....6..0..5

..6..5..8....6..7..8....4..3..8....6..5..4....6..7..4....6..7..8....4..7..8

CROSSREFS

Sequence in context: A064448 A173215 A110817 * A110860 A050995 A174954

Adjacent sequences:  A189425 A189426 A189427 * A189429 A189430 A189431

KEYWORD

nonn

AUTHOR

R. H. Hardin Apr 22 2011

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 29 04:13 EDT 2020. Contains 334696 sequences. (Running on oeis4.)