A300535 Number of nX4 0..1 arrays with every element equal to 0, 2, 3 or 4 horizontally, vertically or antidiagonally adjacent elements, with upper left element zero.

1, 16, 36, 300, 1436, 8974, 52012, 311037, 1845926, 11005063, 65583577, 390991796, 2331383710, 13900965032, 82892406341, 494278699068, 2947415376806, 17575447550343, 104803246864144, 624945156416678, 3726574928599652

Offset

1,2

Comments

Column 4 of A300539.

Links

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

R. H. Hardin, Empirical recurrence of order 75

Formula

Empirical recurrence of order 75 (see link above)

Example

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

Crossrefs

Cf. A300539.

Sequence in context: A273373 A264546 A218523 * A053893 A068833 A116190

Adjacent sequences: A300532 A300533 A300534 * A300536 A300537 A300538

Keyword

nonn

Author

R. H. Hardin, Mar 08 2018

Status

approved