A293090 Number of 4 X n 0..1 arrays with the number of 1's horizontally or antidiagonally adjacent to some 0 two less than the number of 0's adjacent to some 1.

0, 10, 498, 8108, 125848, 1900201, 28709764, 435581165, 6638075636, 101571134541, 1559620441607, 24020341461662, 370919586815724, 5740889185248758, 89034754024149656, 1383318002074531596, 21526968518644809557

Offset: 1

Author

R. H. Hardin, Sep 30 2017

Keywords

• nonn

Comments

Row 4 of A293087.

Examples

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

Links

• R. H. Hardin, Table of n, a(n) for n = 1..174

Crossrefs

Cf. A293087.