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A318424 Number of nXn 0..1 arrays with every element unequal to 1, 2, 3 or 6 horizontally, vertically or antidiagonally adjacent elements, with upper left element zero. 0
0, 5, 36, 889, 19645, 1216538, 99435165, 16560787736, 4592429086849, 2333365855609501, 2101260262723993958 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

Diagonal of A318430.

LINKS

Table of n, a(n) for n=1..11.

EXAMPLE

Some solutions for n=5

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

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

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

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

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

CROSSREFS

Cf. A318430.

Sequence in context: A252782 A292194 A118018 * A156355 A002666 A222592

Adjacent sequences:  A318421 A318422 A318423 * A318425 A318426 A318427

KEYWORD

nonn

AUTHOR

R. H. Hardin, Aug 26 2018

STATUS

approved

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Last modified May 25 04:50 EDT 2019. Contains 323539 sequences. (Running on oeis4.)