A231318 Number of (n+1) X (2+1) 0..2 arrays with no element equal to a strict majority of its diagonal and antidiagonal neighbors, with values 0..2 introduced in row major order.

24, 432, 9600, 192192, 3917184, 79306752, 1607468544, 32569451520, 659942375424, 13371898245120, 270945239064576, 5489964932136960, 111239155883802624, 2253957795356147712, 45670301427851329536, 925383976903713226752

Offset: 1

Author

R. H. Hardin, Nov 07 2013

Keywords

• nonn

Comments

Column 2 of A231324.

Examples

			Some solutions for n=4
..0..1..0....0..0..1....0..0..0....0..1..0....0..1..0....0..0..0....0..0..0
..0..1..2....0..2..1....1..2..1....0..1..1....2..2..0....1..2..0....1..1..1
..0..0..0....2..1..1....2..0..0....1..2..0....1..0..2....2..1..2....2..2..2
..1..0..0....2..0..0....2..1..1....2..0..2....1..1..2....2..0..0....0..2..0
..2..2..1....2..0..1....2..2..2....2..1..2....2..2..0....2..2..2....1..1..0
		

Links

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

Crossrefs

Cf. A231324.

Formula

Empirical: a(n) = 22*a(n-1) -776*a(n-3) +944*a(n-4) +7168*a(n-5) -12416*a(n-6) +9216*a(n-8) -4096*a(n-9).