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A302065 Number of nX4 0..1 arrays with every element equal to 0, 1, 2 or 4 horizontally or antidiagonally adjacent elements, with upper left element zero. 1
8, 81, 748, 7070, 67070, 636852, 6048836, 57457232, 545796112, 5184660760, 49250608992, 467846412016, 4444215843808, 42216967044320, 401031909830432, 3809525073635904, 36187846859821376, 343759454672598656 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 4 of A302069.

LINKS

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

FORMULA

Empirical: a(n) = 16*a(n-1) -76*a(n-2) +148*a(n-3) -124*a(n-4) +36*a(n-5) for n>6

EXAMPLE

Some solutions for n=5

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

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

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

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

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

CROSSREFS

Cf. A302069.

Sequence in context: A007792 A301837 A264185 * A098308 A055996 A324016

Adjacent sequences:  A302062 A302063 A302064 * A302066 A302067 A302068

KEYWORD

nonn

AUTHOR

R. H. Hardin, Mar 31 2018

STATUS

approved

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Last modified August 7 21:38 EDT 2022. Contains 355995 sequences. (Running on oeis4.)