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A302883 Number of nXn 0..1 arrays with every element equal to 0, 2, 3, 4 or 5 horizontally, diagonally or antidiagonally adjacent elements, with upper left element zero. 0
1, 2, 37, 238, 20937, 3452246, 2899297652, 7977498513759, 75895729469717417 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

Diagonal of A302889.

LINKS

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

EXAMPLE

Some solutions for n=5

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

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

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

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

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

CROSSREFS

Cf. A302889.

Sequence in context: A139119 A244757 A298476 * A053788 A078976 A200911

Adjacent sequences:  A302880 A302881 A302882 * A302884 A302885 A302886

KEYWORD

nonn

AUTHOR

R. H. Hardin, Apr 15 2018

STATUS

approved

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Last modified September 20 03:55 EDT 2019. Contains 327212 sequences. (Running on oeis4.)