VOOZH about

URL: https://oeis.org/A318208

⇱ A318208 - OEIS

login
A318208
Number of nXn 0..1 arrays with every element unequal to 1, 2, 4 or 5 horizontally, vertically or antidiagonally adjacent elements, with upper left element zero.
0
0, 3, 4, 69, 1042, 28010, 1122773, 93034400, 12949799902, 3077725091253
OFFSET
1,2
COMMENTS
Diagonal of A318214.
EXAMPLE
Some solutions for n=5
..0..1..0..0..1. .0..1..1..0..0. .0..0..0..1..1. .0..1..1..1..1
..1..1..0..1..1. .1..1..0..0..1. .1..1..0..1..0. .1..0..0..1..0
..0..0..0..0..1. .1..0..0..1..1. .1..0..1..1..1. .1..1..1..1..1
..0..1..0..1..1. .0..0..0..0..0. .0..1..1..1..1. .1..1..1..1..1
..1..1..1..1..0. .0..1..0..0..1. .0..0..0..0..0. .0..0..0..0..0
CROSSREFS
Cf. A318214.
Sequence in context: A356292 A012087 A012194 * A341851 A389590 A132414
KEYWORD
nonn
AUTHOR
R. H. Hardin, Aug 21 2018
STATUS
approved