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A326099
Number of nXn 0..1 arrays with every element equal to 0, 1, 2, 3 or 6 horizontally, vertically or antidiagonally adjacent elements, with upper left element zero.
0
1, 8, 161, 8628, 1233763, 463572941, 457515856087, 1187662505828132, 8109848158608706092, 145652282125715208618002, 6879822326742091298103753274
OFFSET
1,2
COMMENTS
Diagonal of A326105.
EXAMPLE
Some solutions for n=5
..0..0..0..0..0. .0..0..0..0..0. .0..0..0..0..0. .0..0..0..0..1
..1..0..1..1..1. .1..1..0..1..1. .1..0..1..0..1. .0..1..1..1..0
..1..0..0..0..1. .1..0..1..0..1. .1..1..0..1..0. .0..1..0..0..0
..1..1..0..1..0. .1..1..1..0..1. .1..0..0..1..1. .1..0..1..1..1
..1..1..0..1..0. .0..0..0..0..1. .1..1..0..1..1. .0..1..0..1..0
CROSSREFS
Cf. A326105.
Sequence in context: A140337 A245322 A305524 * A171461 A065116 A240410
KEYWORD
nonn
AUTHOR
R. H. Hardin, Jun 06 2019
STATUS
approved