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A300426 Number of nX7 0..1 arrays with every element equal to 1, 2 or 3 horizontally, vertically or antidiagonally adjacent elements, with upper left element zero. 1
8, 981, 37042, 1240541, 41940055, 1429216222, 48707694395, 1658695873019, 56476495490791, 1923047237868526, 65481763889325791, 2229710018276335601, 75923489576925169301, 2585258366904643253068, 88030215196778828100398 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 7 of A300427.

LINKS

R. H. Hardin, Table of n, a(n) for n = 1..210

EXAMPLE

Some solutions for n=5

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

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

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

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

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

CROSSREFS

Cf. A300427.

Sequence in context: A231905 A203524 A331491 * A300688 A300611 A301353

Adjacent sequences:  A300423 A300424 A300425 * A300427 A300428 A300429

KEYWORD

nonn

AUTHOR

R. H. Hardin, Mar 05 2018

STATUS

approved

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Last modified December 6 18:16 EST 2021. Contains 349567 sequences. (Running on oeis4.)