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A304693 Number of nX4 0..1 arrays with every element unequal to 1, 2, 3, 5 or 6 king-move adjacent elements, with upper left element zero. 1
2, 45, 178, 918, 4910, 24408, 124399, 641663, 3271834, 16747810, 85795064, 438971334, 2247194765, 11504929439, 58893248470, 301494626010, 1543466274885, 7901476939284, 40450502258451, 207080879283742, 1060121076327341 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 4 of A304697.

LINKS

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

R. H. Hardin, Empirical recurrence of order 69

FORMULA

Empirical recurrence of order 69 (see link above)

EXAMPLE

Some solutions for n=5

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

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

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

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

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

CROSSREFS

Cf. A304697.

Sequence in context: A019579 A302220 A302666 * A200158 A316444 A316126

Adjacent sequences:  A304690 A304691 A304692 * A304694 A304695 A304696

KEYWORD

nonn

AUTHOR

R. H. Hardin, May 17 2018

STATUS

approved

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Last modified July 23 22:20 EDT 2021. Contains 346265 sequences. (Running on oeis4.)