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A283640 Number of 7Xn 0..1 arrays with no 1 equal to more than one of its horizontal, diagonal and antidiagonal neighbors, with the exception of exactly two elements. 1
0, 2458, 203025, 8209582, 317384829, 11651389723, 392539665568, 12499158065289, 391064828730137, 11763799548894544, 348148848497732064, 10109926834771861782, 289155453391286387579, 8172119594621868557289 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

Row 7 of A283634.

LINKS

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

EXAMPLE

Some solutions for n=2

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

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

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

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

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

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

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

CROSSREFS

Cf. A283634.

Sequence in context: A252098 A252097 A252225 * A043588 A043798 A043814

Adjacent sequences:  A283637 A283638 A283639 * A283641 A283642 A283643

KEYWORD

nonn

AUTHOR

R. H. Hardin, Mar 12 2017

STATUS

approved

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Last modified January 29 05:09 EST 2022. Contains 350672 sequences. (Running on oeis4.)