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A298224
Number of n X n 0..1 arrays with every element equal to 0, 1, 3, 4 or 5 king-move adjacent elements, with upper left element zero.
0
1, 4, 5, 195, 1749, 110320, 25406586, 7311722995, 11308912804354
OFFSET
1,2
COMMENTS
Diagonal of A298230.
EXAMPLE
Some solutions for n=6
..0..0..1..1..0..0. .0..0..1..1..0..1. .0..1..1..0..1..0. .0..0..1..1..0..1
..1..1..1..1..1..1. .0..0..1..1..1..0. .1..1..0..1..1..1. .0..0..1..1..1..0
..1..1..0..0..1..1. .1..0..0..0..1..1. .1..0..0..0..1..0. .0..1..1..0..0..0
..0..1..0..0..0..1. .0..1..0..0..1..1. .1..0..0..1..1..0. .1..0..1..1..1..0
..1..1..1..0..1..1. .1..1..1..1..1..0. .1..1..0..1..0..0. .0..0..0..0..0..0
..0..1..1..1..1..0. .1..1..0..1..1..0. .1..1..1..0..0..1. .1..0..1..0..0..1
CROSSREFS
Cf. A298230.
Sequence in context: A331578 A355705 A041745 * A051152 A042181 A368531
KEYWORD
nonn
AUTHOR
R. H. Hardin, Jan 15 2018
STATUS
approved