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!)
A296820 Number of n X n 0..1 arrays with each 1 adjacent to 2, 3 or 4 king-move neighboring 1's. 0
1, 6, 94, 2272, 510086, 267542809, 364592446431, 2034946979145210, 34966993876417278748 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

Diagonal of A296827.

LINKS

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

EXAMPLE

Some solutions for n=4

..0..0..1..1. .1..1..0..0. .1..1..1..1. .0..0..0..0. .0..0..0..0

..1..1..0..1. .0..1..0..0. .1..0..0..1. .0..0..0..0. .1..1..1..0

..0..1..0..1. .0..1..0..0. .0..1..1..0. .1..1..1..0. .0..1..1..0

..0..0..1..1. .1..1..1..0. .0..0..1..1. .0..1..0..0. .0..0..0..0

CROSSREFS

Cf. A296827.

Sequence in context: A221525 A321073 A198257 * A184983 A184980 A184981

Adjacent sequences:  A296817 A296818 A296819 * A296821 A296822 A296823

KEYWORD

nonn

AUTHOR

R. H. Hardin, Dec 21 2017

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 26 13:18 EST 2021. Contains 340439 sequences. (Running on oeis4.)