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A303519 Number of n X n 0..1 arrays with every element equal to 0, 1, 3, 4, 5 or 6 horizontally, diagonally or antidiagonally adjacent elements, with upper left element zero. 0
1, 3, 18, 103, 1758, 102779, 15768709, 6835357512, 8858057538977 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

Diagonal of A303525.

LINKS

Table of n, a(n) for n=1..9.

EXAMPLE

Some solutions for n=5

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

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

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

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

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

CROSSREFS

Cf. A303525.

Sequence in context: A038158 A327828 A009021 * A124408 A136779 A106328

Adjacent sequences:  A303516 A303517 A303518 * A303520 A303521 A303522

KEYWORD

nonn

AUTHOR

R. H. Hardin, Apr 25 2018

STATUS

approved

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Last modified September 23 02:41 EDT 2021. Contains 347609 sequences. (Running on oeis4.)