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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
OFFSET
1,4
COMMENTS
Diagonal of A317902.
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: A269515 A166272 A358744 * A195878 A013545 A120273
KEYWORD
nonn
AUTHOR
R. H. Hardin, Aug 10 2018
STATUS
approved