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A302206 Number of n X n 0..1 arrays with every element equal to 0, 2 or 3 horizontally, diagonally or antidiagonally adjacent elements, with upper left element zero. 0
1, 2, 16, 7, 448, 1395, 55922, 3509969, 73189971, 33707749345, 2102356505182 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

Diagonal of A302212.

LINKS

Table of n, a(n) for n=1..11.

EXAMPLE

Some solutions for n=5

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

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

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

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

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

CROSSREFS

Cf. A302212.

Sequence in context: A211367 A351585 A220314 * A110008 A296728 A110875

Adjacent sequences:  A302203 A302204 A302205 * A302207 A302208 A302209

KEYWORD

nonn

AUTHOR

R. H. Hardin, Apr 03 2018

STATUS

approved

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Last modified May 17 17:52 EDT 2022. Contains 353778 sequences. (Running on oeis4.)