A282786 Number of nX3 0..1 arrays with no 1 equal to more than one of its king-move neighbors, with the exception of exactly one element.

1, 8, 73, 318, 1747, 8216, 38027, 173722, 773529, 3412416, 14880845, 64319686, 276057515, 1177345064, 4994757435, 21091941082, 88706514017, 371741444080, 1552891025645, 6468454612966, 26874623008899, 111396556833528

Offset: 1

Author

R. H. Hardin, Feb 21 2017

Keywords

• nonn

Comments

Column 3 of A282791.

Examples

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

Links

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

Crossrefs

Cf. A282791.

Formula

Empirical: a(n) = 4*a(n-1) +8*a(n-2) -8*a(n-3) -78*a(n-4) -72*a(n-5) -16*a(n-6) +64*a(n-7) -33*a(n-8) +52*a(n-9) -24*a(n-10) +8*a(n-11) -4*a(n-12)