A240033 Number of n X n 0..2 arrays with no element equal to zero plus the sum of elements to its left or zero plus the sum of the elements above it or zero plus the sum of the elements diagonally to its northwest, modulo 3

2, 2, 16, 18, 154, 282, 1976, 5706, 42470, 147092, 1196210, 5215010, 48697758, 245354078, 2815029508, 16378986516

Offset

1,1

Comments

Diagonal of A240039

Links

Table of n, a(n) for n=1..16.

Example

Some solutions for n=3
..2..1..1....1..2..1....2..1..2....1..2..2....2..1..2....1..2..2....1..2..1
..1..0..0....2..0..0....1..0..0....2..0..1....1..0..0....2..0..0....2..0..0
..2..0..0....1..0..0....2..0..0....1..0..2....1..0..0....1..0..0....1..0..2

Crossrefs

Sequence in context: A352348 A133922 A222954 * A088139 A152556 A113123

Adjacent sequences: A240030 A240031 A240032 * A240034 A240035 A240036

Keyword

nonn

Author

R. H. Hardin, Mar 31 2014

Status

approved