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A320396 Number of n X n 0..1 arrays with every element unequal to 0, 1, 2, 3 or 5 horizontally, vertically or antidiagonally adjacent elements, with upper left element zero. 0
1, 8, 142, 5956, 561290, 127789964, 69104597430, 87904609418608, 265822679694670068, 1902510531491092792194 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

Diagonal of A320402.

LINKS

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

EXAMPLE

Some solutions for n=5:

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

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

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

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

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

CROSSREFS

Cf. A320402.

Sequence in context: A305763 A180357 A317112 * A112464 A227875 A235383

Adjacent sequences:  A320393 A320394 A320395 * A320397 A320398 A320399

KEYWORD

nonn,more

AUTHOR

R. H. Hardin, Oct 12 2018

STATUS

approved

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Last modified April 4 21:43 EDT 2020. Contains 333238 sequences. (Running on oeis4.)