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A301525 Number of nXn 0..1 arrays with every element equal to 0, 2, 3, 4, 5 or 6 horizontally, vertically or antidiagonally adjacent elements, with upper left element zero. 0
1, 3, 24, 742, 74479, 26709523, 31363814530, 120807264770256, 1517371393218125575, 62110657600904496291408, 8277571116888590675642278187 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

Diagonal of A301531.

LINKS

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

EXAMPLE

Some solutions for n=5

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

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

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

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

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

CROSSREFS

Cf. A301531.

Sequence in context: A056207 A297561 A326084 * A277177 A226053 A233894

Adjacent sequences:  A301522 A301523 A301524 * A301526 A301527 A301528

KEYWORD

nonn

AUTHOR

R. H. Hardin, Mar 23 2018

STATUS

approved

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Last modified December 5 16:12 EST 2019. Contains 329753 sequences. (Running on oeis4.)