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!)
A283690 Number of nX7 0..1 arrays with no 1 equal to more than two of its horizontal, diagonal and antidiagonal neighbors. 1
128, 6081, 268285, 13354587, 640543058, 30968693109, 1496646288297, 72299799564414, 3493423029563345, 168787432899036492, 8155161269130497936, 394026399329673608352, 19037838247755538800787, 919835398042802262299271 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 7 of A283691.

LINKS

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

EXAMPLE

Some solutions for n=2

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

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

CROSSREFS

Cf. A283691.

Sequence in context: A282527 A297093 A185488 * A008791 A201239 A013700

Adjacent sequences:  A283687 A283688 A283689 * A283691 A283692 A283693

KEYWORD

nonn

AUTHOR

R. H. Hardin, Mar 14 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 May 27 16:48 EDT 2022. Contains 354110 sequences. (Running on oeis4.)