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A301492 Number of n X n 0..1 arrays with every element equal to 0, 1, 3, 4, 5 or 6 horizontally, vertically or antidiagonally adjacent elements, with upper left element zero. 0
1, 3, 5, 83, 2803, 268802, 62812639, 39447933621, 63780972381537, 267328043698021585 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

Diagonal of A301498.

LINKS

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

EXAMPLE

Some solutions for n=5

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

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

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

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

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

CROSSREFS

Cf. A301498.

Sequence in context: A062214 A323490 A144617 * A107655 A182234 A308612

Adjacent sequences:  A301489 A301490 A301491 * A301493 A301494 A301495

KEYWORD

nonn

AUTHOR

R. H. Hardin, Mar 22 2018

STATUS

approved

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Last modified August 2 02:53 EDT 2021. Contains 346409 sequences. (Running on oeis4.)