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A210259
Number of (n+1)X(n+1) 0..3 arrays containing all values 0..3 with every 2X2 subblock having three distinct values, and new values 0..3 introduced in row major order
0
0, 1039, 1409910, 9204003223, 332946143914838, 67504950532170896962, 76734939290291126791703390, 489053432070220933819410319061667
OFFSET
1,2
COMMENTS
Diagonal of A210267
EXAMPLE
Some solutions for n=4
..0..0..0..0..0....0..0..1..0..0....0..0..0..0..0....0..1..0..2..1
..1..2..3..2..3....2..3..0..2..3....1..2..1..2..1....3..0..3..2..0
..3..2..0..0..0....3..0..1..2..0....0..2..3..3..3....2..2..0..3..3
..1..2..3..2..3....2..3..1..3..2....1..2..0..2..0....3..0..3..2..1
..0..2..1..1..1....3..0..3..2..0....1..3..0..1..1....3..1..3..0..0
CROSSREFS
Sequence in context: A288413 A020395 A069456 * A233854 A168412 A183742
KEYWORD
nonn
AUTHOR
R. H. Hardin Mar 19 2012
STATUS
approved