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A303310 Number of nX4 0..1 arrays with every element equal to 0, 1, 4, 5 or 6 horizontally, diagonally or antidiagonally adjacent elements, with upper left element zero. 1
5, 5, 17, 36, 74, 165, 361, 783, 1710, 3744, 8176, 17851, 39009, 85239, 186206, 406800, 888794, 1941803, 4242301, 9268393, 20249240, 44239542, 96652372, 211161719, 461336399, 1007905991, 2202025876, 4810883806, 10510594448, 22963055655 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 4 of A303314.

LINKS

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

FORMULA

Empirical: a(n) = a(n-1) +a(n-2) +3*a(n-3) +2*a(n-4) -a(n-5) -2*a(n-6) -a(n-7) for n>10

EXAMPLE

Some solutions for n=5

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

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

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

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

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

CROSSREFS

Cf. A303314.

Sequence in context: A100745 A283089 A283142 * A028892 A255448 A255445

Adjacent sequences:  A303307 A303308 A303309 * A303311 A303312 A303313

KEYWORD

nonn

AUTHOR

R. H. Hardin, Apr 21 2018

STATUS

approved

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Last modified March 7 14:00 EST 2021. Contains 341886 sequences. (Running on oeis4.)