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A302871 Number of n X n 0..1 arrays with every element equal to 0, 1, 3, 4 or 5 horizontally, diagonally or antidiagonally adjacent elements, with upper left element zero. 0
1, 3, 17, 95, 1197, 45897, 3780984, 786125894, 460770487307 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

Diagonal of A302877.

LINKS

Table of n, a(n) for n=1..9.

EXAMPLE

Some solutions for n=5

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

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

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

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

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

CROSSREFS

Cf. A302877.

Sequence in context: A020056 A086842 A151330 * A010913 A142988 A056660

Adjacent sequences:  A302868 A302869 A302870 * A302872 A302873 A302874

KEYWORD

nonn

AUTHOR

R. H. Hardin, Apr 15 2018

STATUS

approved

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Last modified April 19 08:06 EDT 2021. Contains 343110 sequences. (Running on oeis4.)