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A317513 Number of nX4 0..1 arrays with every element unequal to 0, 1, 2, 3, 4, 5, 6 or 7 king-move adjacent elements, with upper left element zero. 1
8, 128, 2032, 32256, 512096, 8130048, 129072576, 2049155072, 32532368768, 516483614720, 8199689547520, 130178202673152, 2066708056827392, 32811039824240640, 520907793817967616, 8269927777778991104 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,1
COMMENTS
Column 4 of A317517.
LINKS
FORMULA
Empirical: a(n) = 16*a(n-1) -6*a(n-2) +64*a(n-3)
EXAMPLE
Some solutions for n=5
..0..0..0..0. .0..0..0..0. .0..0..0..0. .0..0..0..1. .0..0..0..0
..1..1..0..0. .1..1..1..0. .0..0..0..0. .0..0..1..0. .1..0..1..0
..0..0..0..0. .0..1..1..0. .1..0..1..0. .1..0..1..1. .1..0..1..0
..1..0..0..1. .1..1..1..0. .0..1..0..0. .1..1..1..0. .0..0..1..1
..0..0..1..1. .1..0..1..0. .1..0..0..0. .1..1..1..0. .1..0..0..1
CROSSREFS
Cf. A317517.
Sequence in context: A303417 A303423 A301403 * A300178 A013777 A183497
KEYWORD
nonn
AUTHOR
R. H. Hardin, Jul 30 2018
STATUS
approved

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Last modified March 29 02:23 EDT 2024. Contains 371264 sequences. (Running on oeis4.)