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

1,1

Comments

Column 2 of A231324.

Links

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

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).

Example

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

Crossrefs

Cf. A231324.

Sequence in context: A081128 A059158 A062149 * A083195 A004358 A006260

Adjacent sequences: A231315 A231316 A231317 * A231319 A231320 A231321

Keyword

nonn

Author

R. H. Hardin, Nov 07 2013

Status

approved