A231127 Number of (n+1)X(4+1) white-square subarrays of 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.

16, 176, 2260, 27664, 336004, 4150352, 50257244, 621150768, 7520563372, 92952785328, 1125418461348, 13909988936720, 168414092245220, 2081570967982416, 25202456511185596, 311498292593207728

Offset: 1

Author

R. H. Hardin, Nov 04 2013

Keywords

• nonn

Comments

Column 4 of A231131

Examples

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

Links

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

Formula

Empirical: a(n) = 175*a(n-2) -4017*a(n-4) +34311*a(n-6) -146236*a(n-8) +322472*a(n-10) -291040*a(n-12) +116032*a(n-14) -24064*a(n-16) +1024*a(n-18)