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!)
A283521 Number of nX7 0..1 arrays with no 1 equal to more than three of its horizontal, vertical and antidiagonal neighbors, with the exception of exactly two elements. 1
0, 703, 241796, 34279720, 4331276717, 510843580504, 56913176714906, 6121670820777639, 641300961433598943, 65816441365940780452, 6645264195595547215366, 662013827914324498953906 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

Column 7 of A283522.

LINKS

R. H. Hardin, Table of n, a(n) for n = 1..210

EXAMPLE

Some solutions for n=2

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

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

CROSSREFS

Cf. A283522.

Sequence in context: A045146 A083735 A161021 * A334010 A257721 A253396

Adjacent sequences:  A283518 A283519 A283520 * A283522 A283523 A283524

KEYWORD

nonn

AUTHOR

R. H. Hardin, Mar 09 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 | Recents
The OEIS Community | Maintained by The OEIS Foundation Inc.

License Agreements, Terms of Use, Privacy Policy. .

Last modified June 28 21:04 EDT 2022. Contains 354907 sequences. (Running on oeis4.)