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!)
A302664 Number of n X n 0..1 arrays with every element equal to 1, 2, 3 or 6 horizontally, diagonally or antidiagonally adjacent elements, with upper left element zero. 0
0, 3, 43, 934, 42367, 3640304, 637088915, 219692176894, 138670742999582 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

Diagonal of A302670.

LINKS

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

EXAMPLE

Some solutions for n=5

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

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

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

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

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

CROSSREFS

Cf. A302670.

Sequence in context: A141060 A277496 A302218 * A201784 A340822 A355004

Adjacent sequences:  A302661 A302662 A302663 * A302665 A302666 A302667

KEYWORD

nonn

AUTHOR

R. H. Hardin, Apr 11 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 October 7 15:50 EDT 2022. Contains 357275 sequences. (Running on oeis4.)