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A326159 Number of n X n 0..1 arrays with every element unequal to 0, 1, 3, 4 or 5 horizontally, vertically or antidiagonally adjacent elements, with upper left element zero. 0
1, 3, 9, 85, 1136, 39808, 3984553, 1000921717, 666253766253, 1113066644514662 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

Diagonal of A326165.

LINKS

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

EXAMPLE

Some solutions for n=5:

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

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

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

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

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

CROSSREFS

Cf. A326165.

Sequence in context: A274032 A032078 A307799 * A203559 A184098 A249789

Adjacent sequences:  A326156 A326157 A326158 * A326160 A326161 A326162

KEYWORD

nonn,more

AUTHOR

R. H. Hardin, Jun 09 2019

STATUS

approved

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Last modified July 11 23:53 EDT 2020. Contains 335654 sequences. (Running on oeis4.)