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A301324 Number of n X n 0..1 arrays with every element equal to 0, 2, 3, 5 or 6 horizontally, vertically or antidiagonally adjacent elements, with upper left element zero. 0
1, 3, 7, 45, 664, 17491, 1127238, 135428462, 34057380439, 17040140705965 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

Diagonal of A301330.

LINKS

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

EXAMPLE

Some solutions for n=5

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

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

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

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

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

CROSSREFS

Cf. A301330.

Sequence in context: A267844 A041349 A041016 * A184339 A294915 A003758

Adjacent sequences:  A301321 A301322 A301323 * A301325 A301326 A301327

KEYWORD

nonn

AUTHOR

R. H. Hardin, Mar 18 2018

STATUS

approved

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Last modified September 23 22:32 EDT 2020. Contains 337315 sequences. (Running on oeis4.)