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Number of nXn n X n 0..1 arrays with every element equal to 0, 1, 2, 4, 6 or 7 king-move adjacent elements, with upper left element zero.
approved
editing
editing
approved
allocated for R. H. Hardin
Number of nXn 0..1 arrays with every element equal to 0, 1, 2, 4, 6 or 7 king-move adjacent elements, with upper left element zero.
1, 7, 20, 75, 626, 3773, 59287, 1666826, 51863841, 3412264531
1,2
Diagonal of A299187.
Some solutions for n=5
..0..1..1..0..1. .0..1..0..0..1. .0..0..1..0..0. .0..1..0..0..0
..1..0..0..1..1. .0..0..0..0..0. .1..0..1..1..0. .1..0..0..0..1
..0..0..1..0..0. .0..0..0..0..0. .0..1..0..1..1. .0..0..0..0..0
..0..0..0..0..1. .0..1..0..1..0. .1..0..1..1..1. .1..1..1..0..0
..1..0..0..1..1. .1..1..0..1..1. .0..0..1..0..1. .0..0..0..1..0
Cf. A299187.
allocated
nonn
R. H. Hardin, Feb 04 2018
approved
editing
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allocated
allocated for R. H. Hardin
allocating
approved