A293088 Number of 2 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, 0, 5, 23, 124, 518, 2103, 8304, 32561, 127188, 497290, 1944992, 7609668, 29781058, 116601073, 456769568, 1790429581, 7022484654, 27560850105, 108231066278, 425262686638, 1671850997415, 6576007463557, 25878627324698, 101888312587090

Offset

1,3

Comments

Row 2 of A293087.

Links

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

Example

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

Crossrefs

Cf. A293087.

Sequence in context: A361305 A200028 A020032 * A186755 A009321 A078509

Adjacent sequences: A293085 A293086 A293087 * A293089 A293090 A293091

Keyword

nonn

Author

R. H. Hardin, Sep 30 2017

Status

approved