login
A304766
Number of nX7 0..1 arrays with every element unequal to 2, 3, 4, 5 or 6 king-move adjacent elements, with upper left element zero.
1
0, 702, 22187, 1999511, 153265405, 12219307955, 969267512820, 77018325396680, 6119460744287122, 486255500462536848, 38638506180388225818, 3070282856537314013825, 243970256623096658549212
OFFSET
1,2
COMMENTS
Column 7 of A304767.
LINKS
EXAMPLE
Some solutions for n=5
..0..1..1..0..1..0..0. .0..1..1..1..0..0..0. .0..1..1..0..0..0..1
..0..1..0..0..0..1..1. .0..1..0..0..1..1..1. .0..1..0..0..1..1..0
..0..0..0..1..1..1..0. .0..0..0..0..0..1..0. .0..0..0..0..0..1..0
..1..1..0..1..0..0..0. .1..1..0..0..1..0..1. .1..1..0..1..1..1..0
..0..0..1..1..0..1..1. .0..0..1..0..0..1..0. .0..0..1..1..0..0..1
CROSSREFS
Cf. A304767.
Sequence in context: A305456 A305021 A316685 * A316510 A317464 A035852
KEYWORD
nonn
AUTHOR
R. H. Hardin, May 18 2018
STATUS
approved