login
A302316
Number of n X n 0..1 arrays with every element equal to 0, 1, 2 or 4 horizontally, diagonally or antidiagonally adjacent elements, with upper left element zero.
0
1, 8, 65, 953, 20686, 708572, 45861206, 4252740185, 585620151599
OFFSET
1,2
COMMENTS
Diagonal of A302322.
EXAMPLE
Some solutions for n=5
..0..1..1..1..1. .0..1..1..1..0. .0..0..1..0..0. .0..0..1..0..0
..0..0..1..0..1. .1..1..0..1..0. .1..1..0..0..1. .0..1..1..1..0
..1..0..1..0..1. .0..0..0..1..0. .1..0..1..1..1. .1..1..1..1..1
..1..0..1..0..1. .0..1..1..1..1. .1..0..1..0..0. .0..0..1..0..0
..0..1..0..1..0. .1..1..0..0..0. .0..0..0..0..1. .1..0..1..0..0
CROSSREFS
Cf. A302322.
Sequence in context: A081190 A189431 A024105 * A041114 A360847 A320990
KEYWORD
nonn
AUTHOR
R. H. Hardin, Apr 05 2018
STATUS
approved