A284218 Number of n X 4 0..1 arrays with the number of 1's horizontally or antidiagonally adjacent to some 0 equal to the number of 0's adjacent to some 1, with top left element zero.

6, 44, 499, 6511, 91260, 1317770, 19371893, 288303232, 4330336770, 65507133232, 996599090507, 15232184395483, 233708530421124, 3597476814925298, 55530194727444557, 859222993580853779, 13322830756899018309

Offset

1,1

Comments

Column 4 of A284222.

Links

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

Example

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

Crossrefs

Cf. A284222.

Sequence in context: A226045 A001852 A352843 * A295978 A194928 A267074

Adjacent sequences: A284215 A284216 A284217 * A284219 A284220 A284221

Keyword

nonn

Author

R. H. Hardin, Mar 23 2017

Status

approved