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!)
A281610 Number of 7Xn 0..2 arrays with no element equal to more than one of its horizontal, diagonal or antidiagonal neighbors and with new values introduced in order 0 sequentially upwards. 0
365, 52193, 736757, 32354824, 1421127262, 56764280423, 2352459742664, 97337283237331, 4014393674152359 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Row 7 of A281605.

LINKS

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

EXAMPLE

Some solutions for n=2

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

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

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

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

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

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

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

CROSSREFS

Cf. A281605.

Sequence in context: A275357 A275147 A275227 * A233072 A275503 A275400

Adjacent sequences:  A281607 A281608 A281609 * A281611 A281612 A281613

KEYWORD

nonn

AUTHOR

R. H. Hardin, Jan 25 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 September 25 15:27 EDT 2021. Contains 347658 sequences. (Running on oeis4.)