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A300083
Number of n X n 0..1 arrays with every element equal to 0, 1, 3, 5, 6, 7 or 8 king-move adjacent elements, with upper left element zero.
0
1, 4, 1, 25, 415, 1822, 167131, 14634300, 1518807971, 1088211703169
OFFSET
1,2
COMMENTS
Diagonal of A300089.
EXAMPLE
Some solutions for n=5
..0..0..0..0..0. .0..1..1..0..1. .0..1..1..0..1. .0..1..0..1..0
..0..0..0..0..0. .1..0..1..1..0. .0..1..1..0..1. .1..0..0..0..1
..1..1..0..0..0. .1..1..1..1..1. .1..1..1..0..0. .1..1..1..1..1
..1..1..0..0..0. .1..0..1..1..0. .0..1..1..0..1. .0..1..1..1..0
..1..1..0..0..0. .0..1..1..0..1. .1..0..1..1..0. .0..1..1..1..0
CROSSREFS
Cf. A300089.
Sequence in context: A285066 A046860 A089505 * A062328 A263918 A136234
KEYWORD
nonn
AUTHOR
R. H. Hardin, Feb 24 2018
STATUS
approved