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

1,2

Comments

Row 4 of A293087.

Links

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

Example

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

Crossrefs

Cf. A293087.

Sequence in context: A223122 A071096 A039835 * A127947 A095232 A042209

Adjacent sequences: A293087 A293088 A293089 * A293091 A293092 A293093

Keyword

nonn

Author

R. H. Hardin, Sep 30 2017

Status

approved