A230187 Number of 4Xn 0..2 arrays x(i,j) with each element horizontally or antidiagonally next to at least one element with value 2-x(i,j).

0, 129, 1971, 73857, 2432241, 82359177, 2770525761, 93340154655, 3143682463065, 105885454704267, 3566387657985771, 120121801796361177, 4045897974546191799, 136272446957010253599, 4589878342395006746985, 154594591461184687863333

Offset: 1

Author

R. H. Hardin, Oct 11 2013

Keywords

• nonn

Comments

Row 4 of A230184

Examples

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

Links

• R. H. Hardin, Table of n, a(n) for n = 1..210
• R. H. Hardin, Empirical recurrence of order 93

Formula

Empirical recurrence of order 93 (see link above)