login
A302673
Number of 7Xn 0..1 arrays with every element equal to 1, 2, 3 or 6 horizontally, diagonally or antidiagonally adjacent elements, with upper left element zero.
1
0, 1172, 10660, 106793, 2320879, 35549458, 637088915, 11181864782, 188509564214, 3339792969770, 57406756149300, 997632805281762, 17363763785624592, 300575131517843683, 5229363965628293685, 90736499929821199253
OFFSET
1,2
COMMENTS
Row 7 of A302670.
LINKS
EXAMPLE
Some solutions for n=5
..0..0..0..1..0. .0..0..0..1..0. .0..0..0..0..0. .0..0..0..1..1
..1..0..1..0..1. .0..0..1..0..1. .0..0..1..1..0. .1..0..1..0..1
..1..1..1..0..0. .1..0..1..0..0. .1..1..1..1..0. .0..1..1..0..0
..1..1..1..0..1. .0..1..0..1..1. .0..0..0..0..1. .0..0..0..0..0
..1..0..1..1..1. .1..1..0..0..1. .1..1..1..1..0. .1..1..1..1..1
..0..0..1..0..1. .0..1..1..0..1. .1..0..0..1..1. .0..0..0..0..1
..1..1..1..1..0. .1..0..0..1..0. .1..1..0..0..1. .0..0..1..1..1
CROSSREFS
Cf. A302670.
Sequence in context: A253508 A235206 A302230 * A230706 A302477 A303258
KEYWORD
nonn
AUTHOR
R. H. Hardin, Apr 11 2018
STATUS
approved