A318546 - OEIS

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A318546

Number of n X n 0..1 arrays with every element unequal to 1, 2, 4 or 6 horizontally, vertically or antidiagonally adjacent elements, with upper left element zero.

0, 3, 5, 64, 842, 14760, 437825, 21556643, 1516492860, 183780175203

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OFFSET

1,2

COMMENTS

Diagonal of A318552.

LINKS

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

EXAMPLE

Some solutions for n=5:

0 0 1 0 0 0 1 0 1 1 0 0 1 0 1 0 1 0 1 0

1 0 0 0 1 1 1 1 0 0 1 0 0 0 1 0 0 0 0 1

0 0 0 0 0 0 1 1 0 1 0 0 1 1 1 0 0 1 1 1

1 1 0 0 0 1 0 0 0 0 0 1 0 1 0 1 0 1 0 1

1 0 0 1 0 1 0 0 1 0 0 1 1 1 1 0 1 1 1 0

CROSSREFS

Cf. A318552.

Sequence in context: A222644 A181904 A319584 * A076513 A222611 A261071

Adjacent sequences: A318543 A318544 A318545 * A318547 A318548 A318549

KEYWORD

nonn,more

AUTHOR

R. H. Hardin, Aug 28 2018

STATUS

approved