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A301485 Number of nXn 0..1 arrays with every element equal to 0, 1, 2, 4, 5 or 6 horizontally, vertically or antidiagonally adjacent elements, with upper left element zero. 0
1, 7, 52, 599, 15124, 903707, 116648010, 34593556316, 23228787136780, 34303673074888666 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

Diagonal of A301491.

LINKS

Table of n, a(n) for n=1..10.

EXAMPLE

Some solutions for n=5

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

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

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

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

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

CROSSREFS

Cf. A301491.

Sequence in context: A179517 A300932 A300875 * A224501 A241487 A236688

Adjacent sequences:  A301482 A301483 A301484 * A301486 A301487 A301488

KEYWORD

nonn

AUTHOR

R. H. Hardin, Mar 22 2018

STATUS

approved

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Last modified March 22 04:32 EDT 2019. Contains 321406 sequences. (Running on oeis4.)