A230707 Number of (n+3)X(7+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.

3956, 173428, 8053490, 342031378, 14669811856, 625553036008, 26681634560690, 1137681116923966, 48508501856178526, 2068224674692996586, 88181384650502245634, 3759701430154725238638, 160298702553771350622996

Offset: 1

Author

R. H. Hardin, Oct 28 2013

Keywords

• nonn

Comments

Column 7 of A230708

Examples

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

Links

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