login
A299389
Number of n X n 0..1 arrays with every element equal to 0, 1, 3, 4, 6 or 8 king-move adjacent elements, with upper left element zero.
0
1, 4, 3, 63, 508, 2483, 112188, 5884463, 286590596, 77024397318
OFFSET
1,2
COMMENTS
Diagonal of A299393.
EXAMPLE
Some solutions for n=6
..0..1..0..0..0..0. .0..0..1..1..0..0. .0..0..1..1..1..0. .0..0..0..0..1..0
..1..1..1..1..0..0. .0..0..0..0..0..0. .0..0..0..0..1..1. .0..0..1..1..1..1
..0..1..0..0..0..1. .1..0..0..0..0..1. .1..0..0..0..1..0. .1..0..0..0..1..0
..0..1..0..0..0..0. .1..0..0..0..0..1. .1..0..0..0..0..1. .0..0..0..0..1..0
..0..0..0..0..0..1. .1..1..1..0..1..1. .1..1..1..0..0..0. .1..0..0..0..0..0
..0..0..1..0..1..0. .0..1..0..1..1..0. .0..1..0..1..0..0. .0..1..0..1..0..0
CROSSREFS
Cf. A299393.
Sequence in context: A273878 A013335 A298314 * A220556 A371687 A299188
KEYWORD
nonn
AUTHOR
R. H. Hardin, Feb 09 2018
STATUS
approved