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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. 1
32, 2048, 80568, 3027408, 114844160, 4358279956, 165355751224, 6274017360108, 238053099337172, 9032378740709556, 342712998628198880, 13003463911279607676, 493386823293841101596, 18720439479430945278656 (list; graph; refs; listen; history; text; internal format)
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

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Last modified September 22 22:24 EDT 2020. Contains 337291 sequences. (Running on oeis4.)