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

 

Logo

Year-end appeal: Please make a donation to the OEIS Foundation to support ongoing development and maintenance of the OEIS. We are now in our 56th year, we are closing in on 350,000 sequences, and we’ve crossed 9,700 citations (which often say “discovered thanks to the OEIS”).

Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A298447 Number of n X n 0..1 arrays with every element equal to 1, 3, 4, 5 or 6 king-move adjacent elements, with upper left element zero. 0
0, 4, 0, 161, 5938, 255029, 112275165, 141892377970, 300456210546842 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

Diagonal of A298454.

LINKS

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

EXAMPLE

Some solutions for n=5

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

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

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

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

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

CROSSREFS

Cf. A298454.

Sequence in context: A129825 A267441 A264883 * A138734 A265596 A119010

Adjacent sequences:  A298444 A298445 A298446 * A298448 A298449 A298450

KEYWORD

nonn

AUTHOR

R. H. Hardin, Jan 19 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 | Recent
The OEIS Community | Maintained by The OEIS Foundation Inc.

License Agreements, Terms of Use, Privacy Policy. .

Last modified December 8 14:41 EST 2021. Contains 349596 sequences. (Running on oeis4.)