A232960 Number of 6Xn 0..3 arrays with no element x(i,j) adjacent to value 3-x(i,j) horizontally, diagonally or antidiagonally, and top left element zero.

1024, 50421, 5840289, 609853251, 66226131273, 7168373617095, 777971521023633, 84438762415260969, 9167008080471861213, 995247064980829474743, 108055419728642864698437, 11731821554897060580948021

Offset: 1

Author

R. H. Hardin, Dec 02 2013

Keywords

• nonn

Comments

Row 6 of A232955

Examples

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

Links

• R. H. Hardin, Table of n, a(n) for n = 1..210
• R. H. Hardin, Empirical recurrence of order 86

Formula

Empirical recurrence of order 86 (see link above)