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A301355 Number of n X n 0..1 arrays with every element equal to 1, 2, 4, 5 or 6 horizontally, vertically or antidiagonally adjacent elements, with upper left element zero. 0
0, 2, 13, 101, 1356, 44148, 3241470, 456790733, 132506438551, 79120923192740 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

Diagonal of A301361.

LINKS

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

EXAMPLE

Some solutions for n=5

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

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

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

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

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

CROSSREFS

Cf. A301361.

Sequence in context: A141116 A330349 A234299 * A077246 A266906 A107000

Adjacent sequences:  A301352 A301353 A301354 * A301356 A301357 A301358

KEYWORD

nonn

AUTHOR

R. H. Hardin, Mar 19 2018

STATUS

approved

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Last modified July 1 13:12 EDT 2022. Contains 354973 sequences. (Running on oeis4.)