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A301961 Number of nX5 0..1 arrays with every element equal to 0, 1 or 4 horizontally or antidiagonally adjacent elements, with upper left element zero. 1
8, 14, 41, 111, 311, 874, 2454, 6906, 19427, 54659, 153785, 432694, 1217420, 3425350, 9637573, 27116351, 76294719, 214663346, 603978142, 1699356882, 4781321499, 13452757355, 37850765441, 106497159950, 299641101508, 843072151982 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 5 of A301964.

LINKS

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

FORMULA

Empirical: a(n) = 2*a(n-1) +3*a(n-2) -a(n-3) -2*a(n-4) -3*a(n-5) +2*a(n-6) for n>8

EXAMPLE

Some solutions for n=5

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

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

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

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

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

CROSSREFS

Cf. A301964.

Sequence in context: A144840 A257709 A121866 * A250478 A059676 A242198

Adjacent sequences:  A301958 A301959 A301960 * A301962 A301963 A301964

KEYWORD

nonn

AUTHOR

R. H. Hardin, Mar 29 2018

STATUS

approved

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Last modified April 22 06:01 EDT 2021. Contains 343161 sequences. (Running on oeis4.)