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A316947
Number of n X n 0..1 arrays with every element unequal to 1, 2, 3, 4, 5, 6 or 7 king-move adjacent elements, with upper left element zero.
1
0, 7, 160, 18956, 8641499, 15440641209, 109086632521219, 3041266904462686586, 334635446051408230633599, 145323559617043972823631878181, 249082491936418607489659470348823605
OFFSET
1,2
COMMENTS
Diagonal of A316953.
LINKS
EXAMPLE
Some solutions for n=5
..0..0..0..1..0. .0..0..0..1..0. .0..0..0..1..0. .0..0..0..1..0
..0..1..0..0..1. .0..1..0..1..0. .0..1..0..0..0. .0..1..0..1..0
..1..1..0..1..0. .1..0..1..0..1. .1..0..0..1..1. .1..1..1..1..1
..0..1..1..1..0. .0..1..1..1..0. .1..1..0..0..1. .1..0..0..0..0
..1..1..0..0..1. .1..0..0..0..1. .0..1..0..1..0. .0..1..0..1..0
CROSSREFS
Cf. A316953.
Sequence in context: A177779 A177469 A121786 * A083153 A320337 A214350
KEYWORD
nonn
AUTHOR
R. H. Hardin, Jul 17 2018
STATUS
approved