A289647 Number of n X 4 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, 44, 607, 8554, 121162, 1756800, 25760875, 382162921, 5717697619, 86172849366, 1306560879457, 19912006342895, 304785181627320, 4682731916448540, 72178508386597722, 1115665066715856620, 17287052005230219381

Offset

1,2

Comments

Column 4 of A289651.

Links

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

Example

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

Crossrefs

Cf. A289651.

Sequence in context: A297680 A264680 A356415 * A252869 A296649 A221505

Adjacent sequences: A289644 A289645 A289646 * A289648 A289649 A289650

Keyword

nonn

Author

R. H. Hardin, Jul 09 2017

Status

approved