login
The OEIS is supported by the many generous donors to the OEIS Foundation.

 

Logo
Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A304420 Number of n X n 0..1 arrays with every element unequal to 1, 2, 3, 4 or 5 king-move adjacent elements, with upper left element zero. 0
0, 7, 124, 9304, 1712347, 898146670, 1305482386171, 5296781617645719, 59891404546831242351 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,2
COMMENTS
Diagonal of A304427.
LINKS
EXAMPLE
Some solutions for n=5
..0..0..0..1..0. .0..0..0..1..0. .0..0..0..1..0. .0..0..0..1..0
..1..0..1..1..1. .1..1..0..0..1. .0..1..1..0..1. .0..1..0..0..1
..0..1..1..0..0. .0..1..1..0..0. .1..1..0..0..1. .1..1..1..0..1
..0..0..1..0..0. .0..1..0..0..1. .0..1..0..0..0. .0..1..1..0..0
..1..1..0..1..0. .1..0..0..1..0. .1..0..0..1..1. .0..0..1..1..0
CROSSREFS
Cf. A304427.
Sequence in context: A192566 A322090 A360337 * A217910 A316276 A220615
KEYWORD
nonn
AUTHOR
R. H. Hardin, May 12 2018
STATUS
approved

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

License Agreements, Terms of Use, Privacy Policy. .

Last modified April 24 10:00 EDT 2024. Contains 371935 sequences. (Running on oeis4.)