A205252 Number of (n+1)X6 0..1 arrays with the number of clockwise edge increases in every 2X2 subblock the same.

976, 15568, 253072, 4136296, 67731268, 1109832184, 18189909484, 298154846440, 4887277903816, 80111933563468, 1313194979326324, 21525927546323464, 352853780193705268, 5783993041849734796, 94811448308361126868

Offset: 1

Author

R. H. Hardin Jan 24 2012

Keywords

• nonn

Comments

Column 5 of A205255

Examples

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

Links

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

Formula

Empirical: a(n) = 31*a(n-1) -321*a(n-2) +1569*a(n-3) -4179*a(n-4) +6420*a(n-5) -5671*a(n-6) +2668*a(n-7) -516*a(n-8)