A293083 Number of n X 4 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, 23, 486, 8108, 126903, 1955375, 30064393, 462569756, 7127871677, 110032675158, 1701716646013, 26365297553133, 409178131040177, 6360241131134572, 99006293076495153, 1543225051401234780, 24083853470118205024

Offset

1,2

Comments

Column 4 of A293087.

Links

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

Example

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

Crossrefs

Cf. A293087.

Sequence in context: A095256 A273008 A015678 * A014905 A200734 A218715

Adjacent sequences: A293080 A293081 A293082 * A293084 A293085 A293086

Keyword

nonn

Author

R. H. Hardin, Sep 30 2017

Status

approved