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A275497
Number of n X n 0..2 arrays with no element equal to any value at offset (-2,-1), (-2,0) or (-1,-1) and new values introduced in order 0..2.
0
1, 9, 80, 656, 4180, 68080, 1643372, 58423188, 3045734096, 235680645520, 26923774835716, 4558306996574952
OFFSET
1,2
COMMENTS
Diagonal of A275504.
EXAMPLE
Some solutions for n=4
..0..0..0..1. .0..1..2..2. .0..0..0..0. .0..1..2..2. .0..1..2..1
..2..1..1..1. .0..2..2..0. .0..1..1..1. .1..1..2..0. .0..1..2..0
..2..1..2..2. .2..2..0..1. .1..1..2..2. .1..2..0..0. .1..2..0..0
..0..0..0..0. .2..1..0..1. .2..2..2..0. .2..0..0..1. .1..2..0..1
CROSSREFS
Cf. A275504.
Sequence in context: A293731 A254833 A342933 * A171314 A370039 A081108
KEYWORD
nonn
AUTHOR
R. H. Hardin, Jul 30 2016
STATUS
approved