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A303678 Number of nX4 0..1 arrays with every element unequal to 0, 1 or 3 king-move adjacent elements, with upper left element zero. 1
5, 17, 15, 28, 44, 64, 90, 132, 204, 312, 466, 688, 1024, 1540, 2318, 3472, 5184, 7748, 11606, 17396, 26052, 38984, 58338, 87340, 130788, 195824, 293146, 438824, 656952, 983564, 1472534, 2204504, 3300280, 4940796, 7396894, 11073932, 16578716 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 4 of A303682.

LINKS

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

FORMULA

Empirical: a(n) = a(n-1) +a(n-4) +a(n-5) for n>8

EXAMPLE

Some solutions for n=5

..0..0..0..1. .0..0..0..0. .0..1..1..1. .0..1..1..1. .0..1..1..1

..0..0..0..0. .0..0..0..0. .0..0..1..1. .1..1..1..1. .1..1..1..1

..1..0..0..0. .0..0..0..1. .0..0..0..1. .1..1..1..1. .1..1..1..1

..1..1..0..0. .0..0..1..1. .0..0..0..0. .1..1..1..1. .0..1..1..1

..1..1..1..0. .0..1..1..1. .1..0..0..0. .0..1..1..0. .0..0..1..1

CROSSREFS

Cf. A303682.

Sequence in context: A096896 A056850 A302631 * A303804 A304851 A237437

Adjacent sequences:  A303675 A303676 A303677 * A303679 A303680 A303681

KEYWORD

nonn

AUTHOR

R. H. Hardin, Apr 28 2018

STATUS

approved

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Last modified September 23 09:53 EDT 2021. Contains 347612 sequences. (Running on oeis4.)