A293080 Number of n 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, 53, 8108, 3786544, 6736259130, 48001754870966, 1383438455350705382, 161312497547006248372814, 76023645347398961263283802334, 144620752785016707502340606159808938

Offset

1,3

Comments

Diagonal of A293087.

Links

R. H. Hardin, Table of n, a(n) for n = 1..12

Example

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

Crossrefs

Cf. A293087.

Sequence in context: A088784 A104820 A093253 * A267950 A268097 A169595

Adjacent sequences: A293077 A293078 A293079 * A293081 A293082 A293083

Keyword

nonn

Author

R. H. Hardin, Sep 30 2017

Status

approved