A230706 Number of (n+3)X(6+3) 0..2 white square subarrays x(i,j) with each element diagonally or antidiagonally next to at least one element with value (x(i,j)+1) mod 3, and upper left element zero.

1172, 21076, 1025430, 17497342, 801845362, 13663471254, 625553036008, 10652997961328, 487784854592488, 8305829325372360, 380324726478587580, 6475874805604555424, 296532282288946047888, 5049115344840115896488

Offset: 1

Author

R. H. Hardin, Oct 28 2013

Keywords

• nonn

Comments

Column 6 of A230708

Examples

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

Links

• R. H. Hardin, Table of n, a(n) for n = 1..210