A320369 Number of nX6 0..1 arrays with every element unequal to 0, 1, 2, 3 or 4 horizontally, vertically or antidiagonally adjacent elements, with upper left element zero.

32, 2048, 80568, 3027408, 114844160, 4358279956, 165355751224, 6274017360108, 238053099337172, 9032378740709556, 342712998628198880, 13003463911279607676, 493386823293841101596, 18720439479430945278656

Offset

1,1

Comments

Column 6 of A320371.

Links

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

R. H. Hardin, Empirical recurrence of order 70

Formula

Empirical recurrence of order 70 (see link above)

Example

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

Crossrefs

Cf. A320371.

Sequence in context: A305521 A316958 A316813 * A298968 A299738 A317563

Adjacent sequences: A320366 A320367 A320368 * A320370 A320371 A320372

Keyword

nonn

Author

R. H. Hardin, Oct 11 2018

Status

approved