A320358 - OEIS

A320358

Number of n X n 0..1 arrays with every element unequal to 2, 3, 4 or 6 horizontally, vertically or antidiagonally adjacent elements, with upper left element zero.

0, 1, 4, 97, 7902, 1752652, 1076542482, 1799446075386, 8145782933199794, 100266040940073292719

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OFFSET

1,3

COMMENTS

Diagonal of A320364.

LINKS

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

EXAMPLE

Some solutions for n=5:

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

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

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

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

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

CROSSREFS

Cf. A320364.

Sequence in context: A041275 A024384 A368004 * A180830 A361883 A265721

Adjacent sequences: A320355 A320356 A320357 * A320359 A320360 A320361

KEYWORD

nonn,more

AUTHOR

R. H. Hardin, Oct 11 2018

STATUS

approved