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

 

Logo

Thanks to everyone who made a donation during our annual appeal!
To see the list of donors, or make a donation, see the OEIS Foundation home page.

Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A206978 Number of 6Xn 0..3 arrays avoiding the pattern z-1 z-1 z in any row, column, nw-to-se diagonal or ne-to-sw antidiagonal 0
3353, 11242609, 20061347530, 35350565625684, 63023113538493420 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Row 6 of A206974

LINKS

Table of n, a(n) for n=1..5.

EXAMPLE

Some solutions for n=4

..0..2..0..3....2..1..2..3....3..1..1..1....0..0..3..0....2..0..0..2

..0..0..2..1....0..1..2..0....3..3..3..1....1..1..3..0....0..2..2..0

..2..0..2..1....0..1..0..0....3..1..3..3....2..2..1..0....1..0..2..0

..0..2..0..3....2..0..3..0....3..1..1..1....3..2..2..0....0..0..0..2

..2..1..0..3....2..0..3..2....3..3..3..0....2..0..0..0....0..2..3..3

..1..0..2..0....1..2..0..2....1..1..1..1....1..2..3..2....3..2..3..0

CROSSREFS

Sequence in context: A251817 A216488 A203782 * A206972 A206575 A207580

Adjacent sequences:  A206975 A206976 A206977 * A206979 A206980 A206981

KEYWORD

nonn

AUTHOR

R. H. Hardin Feb 14 2012

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 January 15 13:34 EST 2021. Contains 340187 sequences. (Running on oeis4.)