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A210099 Number of (n+1) X (n+1) 0..2 arrays with every 2 X 2 subblock having one or three distinct values, and new values 0..2 introduced in row major order. 0
7, 225, 20687, 5115121, 3382058727, 5991606341393, 28434309064956831, 361537376127800203809, 12315682423794584564506503, 1123977764293133379867078361409 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,1
COMMENTS
Diagonal of A210107.
LINKS
EXAMPLE
Some solutions for n=4
..0..0..0..1..1....0..0..0..0..0....0..0..1..2..0....0..0..1..2..2
..0..0..0..2..0....0..0..0..0..0....1..2..2..0..1....2..1..2..0..1
..0..0..0..1..2....1..2..1..2..1....2..0..1..2..2....1..0..1..1..2
..1..2..1..2..0....2..0..0..1..0....2..1..2..0..1....1..2..0..2..0
..0..0..0..2..1....0..1..2..0..2....2..0..0..1..2....1..0..1..1..2
CROSSREFS
Cf. A210107.
Sequence in context: A138247 A322709 A015506 * A193503 A303533 A142606
KEYWORD
nonn
AUTHOR
R. H. Hardin, Mar 17 2012
STATUS
approved

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Last modified March 28 09:04 EDT 2024. Contains 371240 sequences. (Running on oeis4.)