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A301319 Number of n X n 0..1 arrays with every element equal to 0, 1, 2, 5 or 6 horizontally, vertically or antidiagonally adjacent elements, with upper left element zero. 0
1, 7, 45, 302, 1649, 7600, 31172, 119694, 446581, 1658182, 6211592, 23593138, 91031007, 354490536, 1502008575, 5520750802, 463638209284 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

Diagonal of A301323.

LINKS

Table of n, a(n) for n=1..17.

EXAMPLE

Some solutions for n=5

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

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

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

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

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

CROSSREFS

Cf. A301323.

Sequence in context: A182556 A219020 A280597 * A143835 A103719 A134437

Adjacent sequences:  A301316 A301317 A301318 * A301320 A301321 A301322

KEYWORD

nonn

AUTHOR

R. H. Hardin, Mar 18 2018

STATUS

approved

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Last modified October 30 06:31 EDT 2020. Contains 338077 sequences. (Running on oeis4.)