A297686 Number of 6Xn 0..1 arrays with every 1 horizontally, diagonally or antidiagonally adjacent to 0, 1 or 4 neighboring 1s.

64, 865, 18840, 260924, 4870764, 78957968, 1368968852, 22772982621, 388437292266, 6536987996149, 110788354031138, 1870242391300687, 31643467601797592, 534716690271693434, 9041935800076605287

Offset: 1

Author

R. H. Hardin, Jan 03 2018

Keywords

• nonn

Comments

Row 6 of A297682.

Examples

			Some solutions for n=3
..0..0..0. .1..0..1. .1..0..1. .0..0..1. .1..0..0. .0..0..0. .1..1..0
..1..0..0. .0..0..0. .0..0..1. .1..0..1. .0..1..0. .1..0..0. .0..0..0
..0..0..1. .0..0..0. .1..0..1. .0..1..0. .0..1..0. .1..0..0. .1..1..1
..1..1..1. .0..0..0. .1..0..1. .1..0..1. .0..0..0. .1..0..0. .1..0..1
..1..0..0. .0..0..0. .0..1..1. .0..0..0. .1..0..0. .0..0..0. .0..0..0
..0..0..1. .1..0..1. .0..0..1. .0..0..1. .0..0..1. .0..0..1. .1..1..0
		

Links

• R. H. Hardin, Table of n, a(n) for n = 1..210
• Robert Israel, Linear recurrence of order 102
• Robert Israel, Maple-assisted proof of recurrence

Crossrefs

Cf. A297682.

Formula

Linear recurrence of order 102 (see links). - Robert Israel, Oct 28 2019