A300494 Number of nX4 0..1 arrays with every element equal to 0, 1, 2 or 4 horizontally, vertically or antidiagonally adjacent elements, with upper left element zero.

8, 50, 143, 499, 1513, 4686, 14822, 46717, 149232, 478952, 1535689, 4933050, 15841261, 50859780, 163369287, 524865720, 1686760800, 5422294854, 17433648120, 56061128928, 180296581790, 579900593771, 1865330868782, 6000511246681

Offset

1,1

Comments

Column 4 of A300498.

Links

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

R. H. Hardin, Empirical recurrence of order 83

Formula

Empirical recurrence of order 83 (see link above)

Example

Some solutions for n=5
..0..0..0..0. .0..1..0..1. .0..1..0..1. .0..0..1..1. .0..0..1..1
..1..1..1..0. .1..0..1..0. .0..1..0..1. .1..0..1..0. .0..1..0..0
..0..0..1..0. .1..0..1..0. .1..0..1..0. .1..1..1..1. .1..0..1..1
..1..1..0..1. .1..1..0..1. .1..0..1..0. .0..1..0..1. .0..1..0..1
..0..0..1..1. .0..0..1..0. .1..0..0..1. .0..0..1..0. .1..0..1..0

Crossrefs

Cf. A300498.

Sequence in context: A280600 A282774 A258635 * A300933 A300877 A301487

Adjacent sequences: A300491 A300492 A300493 * A300495 A300496 A300497

Keyword

nonn

Author

R. H. Hardin, Mar 07 2018

Status

approved