A293103 Number of 4 X n 0..1 arrays with the number of 1's horizontally, diagonally or antidiagonally adjacent to some 0 two less than the number of 0's adjacent to some 1.

0, 30, 554, 8088, 114318, 1676740, 24773296, 370085158, 5573917456, 84505086146, 1288142241806, 19723300256104, 303110117057606, 4672886017374940, 72233860901133456, 1119204087096130496, 17376470515536487116

Offset

1,2

Comments

Row 4 of A293100.

Links

R. H. Hardin, Table of n, a(n) for n = 1..134

Example

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

Crossrefs

Cf. A293100.

Sequence in context: A139626 A037961 A143399 * A075510 A285168 A028200

Adjacent sequences: A293100 A293101 A293102 * A293104 A293105 A293106

Keyword

nonn

Author

R. H. Hardin, Sep 30 2017

Status

approved