A293101 Number of 2 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, 0, 9, 42, 150, 596, 2220, 8376, 31959, 121768, 465365, 1784742, 6865278, 26474028, 102325886, 396332796, 1538015240, 5978805044, 23278677150, 90767915948, 354389747119, 1385333740384, 5421345875519, 21237273165782, 83270840712919

Offset

1,3

Comments

Row 2 of A293100.

Links

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

Example

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

Crossrefs

Cf. A293100.

Sequence in context: A051923 A180670 A268262 * A084899 A268622 A289364

Adjacent sequences: A293098 A293099 A293100 * A293102 A293103 A293104

Keyword

nonn

Author

R. H. Hardin, Sep 30 2017

Status

approved