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A275177
Number of n X n 0..2 arrays with no element equal to any value at offset (-2,-1), (-1,0) or (-1,1) and new values introduced in order 0..2.
0
1, 4, 25, 141, 1465, 23313, 561044, 20397794, 1120217646, 93298660085, 11806084302586, 2272026396983803, 664988521276834246
OFFSET
1,2
COMMENTS
Diagonal of A275183.
EXAMPLE
Some solutions for n=4
..0..0..1..2. .0..0..0..1. .0..0..0..1. .0..0..0..1. .0..0..0..1
..2..2..0..1. .2..2..2..0. .1..2..2..0. .1..2..2..0. .1..2..2..0
..0..1..2..2. .0..1..1..2. .0..1..1..2. .0..1..1..1. .0..1..1..2
..2..0..0..1. .2..0..0..1. .2..0..0..1. .2..0..0..0. .2..2..0..0
CROSSREFS
Cf. A275183.
Sequence in context: A207410 A278275 A301836 * A079291 A173612 A349540
KEYWORD
nonn
AUTHOR
R. H. Hardin, Jul 19 2016
STATUS
approved