login
A303968
Number of nX7 0..1 arrays with every element unequal to 0, 1, 3 or 5 king-move adjacent elements, with upper left element zero.
1
21, 237, 186, 842, 2247, 6264, 15517, 40239, 101894, 275913, 742329, 1970215, 5207495, 13783510, 36338058, 96289588, 255453841, 676717260, 1792458697, 4748791014, 12573506308, 33301968773, 88224464420, 233692020122
OFFSET
1,1
COMMENTS
Column 7 of A303969.
LINKS
EXAMPLE
Some solutions for n=5
..0..0..1..0..0..0..0. .0..1..1..1..1..1..1. .0..0..0..1..0..0..0
..0..0..0..0..0..0..1. .1..1..1..1..1..1..1. .0..0..0..0..0..0..0
..0..0..0..0..0..1..1. .1..1..1..1..1..1..1. .0..0..0..0..0..0..1
..0..0..0..0..1..1..1. .0..1..1..1..1..1..1. .1..0..0..0..0..0..0
..0..0..0..1..1..1..1. .1..1..1..1..1..0..1. .0..0..0..0..0..0..0
CROSSREFS
Cf. A303969.
Sequence in context: A069601 A173347 A360854 * A304930 A305346 A316614
KEYWORD
nonn
AUTHOR
R. H. Hardin, May 03 2018
STATUS
approved