A293081 Number of n X 2 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, 0, 1, 10, 60, 304, 1420, 6312, 27167, 114412, 474563, 1947098, 7925708, 32072580, 129213082, 518818124, 2077775396, 8304424080, 33138971978, 132078954532, 525904271587, 2092410377864, 8320012474033, 33066905278394, 131371155380369

Offset: 1

Author

R. H. Hardin, Sep 30 2017

Keywords

• nonn

Comments

Column 2 of A293087.

Examples

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

Links

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

Crossrefs

Cf. A293087.