A295780 Number of nX7 0..1 arrays with each 1 adjacent to 0 or 2 king-move neighboring 1s.

34, 739, 7479, 127731, 1905471, 27085621, 409525082, 6037613762, 89072774496, 1321788634101, 19544371605946, 289230460757404, 4281937924123280, 63365816364621759, 937874156712320997, 13881506306783920348

Offset: 1

Author

R. H. Hardin, Nov 27 2017

Keywords

• nonn

Comments

Column 7 of A295781.

Examples

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

Links

• R. H. Hardin, Table of n, a(n) for n = 1..210
• R. H. Hardin, Empirical recurrence of order 91

Crossrefs

Cf. A295781.

Formula

Empirical recurrence of order 91 (see link above)