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A317897 Number of nXn 0..1 arrays with every element unequal to 2, 3 or 6 horizontally, vertically or antidiagonally adjacent elements, with upper left element zero. 0
0, 1, 1, 13, 29, 167, 3630, 38448, 534829, 6617410, 140471071, 2629043923, 75055126813 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,4

COMMENTS

Diagonal of A317902.

LINKS

Table of n, a(n) for n=1..13.

EXAMPLE

Some solutions for n=5

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

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

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

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

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

CROSSREFS

Cf. A317902.

Sequence in context: A209989 A269515 A166272 * A195878 A013545 A120273

Adjacent sequences:  A317894 A317895 A317896 * A317898 A317899 A317900

KEYWORD

nonn

AUTHOR

R. H. Hardin, Aug 10 2018

STATUS

approved

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Last modified May 17 00:26 EDT 2022. Contains 353724 sequences. (Running on oeis4.)