A289646 Number of n X 3 0..1 arrays with the number of 1's horizontally, antidiagonally or vertically adjacent to some 0 two less than the number of 0's adjacent to some 1.

0, 11, 61, 607, 3160, 31271, 183390, 1714758, 10957160, 97430209, 660963859, 5659723958, 40059954256, 334030499016, 2436982696260, 19950172380212, 148739597215073, 1202453728957318, 9105730676248720, 72992556634640541

Offset

1,2

Comments

Column 3 of A289651.

Links

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

Example

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

Crossrefs

Cf. A289651.

Sequence in context: A354336 A088545 A259257 * A020454 A009016 A191596

Adjacent sequences: A289643 A289644 A289645 * A289647 A289648 A289649

Keyword

nonn

Author

R. H. Hardin, Jul 09 2017

Status

approved