A297303 Number of 6Xn 0..1 arrays with every 1 horizontally or antidiagonally adjacent to 2 neighboring 1s.

1, 1, 13, 36, 114, 495, 2816, 14138, 64406, 288079, 1310914, 6040052, 27971466, 129714539, 601185145, 2783395440, 12878290842, 59574077350, 275601620452, 1275129562555, 5900033896489, 27299793712340, 126316193270001

Offset: 1

Author

R. H. Hardin, Dec 27 2017

Keywords

• nonn

Comments

Row 6 of A297299.

Examples

			Some solutions for n=5
..0..1..1..0..0. .0..0..1..1..0. .0..0..1..1..1. .0..0..0..0..0
..1..1..0..0..0. .0..1..1..0..0. .0..1..0..1..1. .0..0..0..0..0
..0..1..1..0..0. .0..0..0..0..0. .1..1..0..1..0. .0..0..0..0..0
..1..1..0..1..1. .0..0..0..0..0. .1..1..1..0..0. .0..0..0..0..0
..0..0..1..1..0. .0..0..0..0..0. .0..0..1..1..0. .0..1..1..0..0
..0..0..0..0..0. .0..0..0..0..0. .0..1..1..0..0. .1..1..0..0..0
		

Links

• R. H. Hardin, Table of n, a(n) for n = 1..210
• R. H. Hardin, Empirical recurrence of order 68

Crossrefs

Cf. A297299.

Formula

Empirical recurrence of order 68 (see link above)