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A283578 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 one element. 1
0, 3232, 194173, 4441052, 164714523, 4558585174, 129997769458, 3650965394740, 99090078168196, 2687260014584534, 71764403257467215, 1902366721060350320, 50085438054862185785, 1310060351650654162702, 34098186251976982332364 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

Row 7 of A283572.

LINKS

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

EXAMPLE

Some solutions for n=3

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

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

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

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

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

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

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

CROSSREFS

Cf. A283572.

Sequence in context: A020414 A202612 A295474 * A231141 A252611 A185465

Adjacent sequences:  A283575 A283576 A283577 * A283579 A283580 A283581

KEYWORD

nonn

AUTHOR

R. H. Hardin, Mar 11 2017

STATUS

approved

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Last modified October 18 08:27 EDT 2021. Contains 348067 sequences. (Running on oeis4.)