A300376 Number of nX4 0..1 arrays with every element equal to 0, 2 or 3 horizontally, vertically or antidiagonally adjacent elements, with upper left element zero.

1, 10, 11, 26, 80, 237, 692, 2548, 8240, 26808, 92281, 309903, 1039489, 3527966, 11931702, 40287280, 136366907, 461541474, 1560895810, 5282067585, 17874953308, 60478794740, 204650044415, 692516520567, 2343315563850, 7929361264807

Offset

1,2

Comments

Column 4 of A300380.

Links

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

R. H. Hardin, Empirical recurrence of order 80

Formula

Empirical recurrence of order 80 (see link above)

Example

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

Crossrefs

Cf. A300380.

Sequence in context: A309357 A051803 A082517 * A136828 A136833 A355631

Adjacent sequences: A300373 A300374 A300375 * A300377 A300378 A300379

Keyword

nonn

Author

R. H. Hardin, Mar 04 2018

Status

approved