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!)
A283956 Number of 7Xn 0..1 arrays with no 1 equal to more than three of its horizontal, diagonal and antidiagonal neighbors, with the exception of exactly one element. 1
0, 0, 597042, 68693470, 6816984648, 669777003928, 62944601744067, 5709831013093658, 508781396370757815, 44682472147852468812, 3874470768927233440485, 332663634061493461202020 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,3

COMMENTS

Row 7 of A283950.

LINKS

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

EXAMPLE

Some solutions for n=3

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

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

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

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

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

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

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

CROSSREFS

Cf. A283950.

Sequence in context: A236736 A205270 A187643 * A151435 A143910 A206598

Adjacent sequences:  A283953 A283954 A283955 * A283957 A283958 A283959

KEYWORD

nonn

AUTHOR

R. H. Hardin, Mar 18 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 January 16 19:48 EST 2022. Contains 350376 sequences. (Running on oeis4.)