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A199585
Number of nX3 0..3 arrays with values 0..3 introduced in row major order, the number of instances of each value within one of each other, and every element equal to at least one horizontal or vertical neighbor
0
0, 0, 20, 23, 1951, 60323, 592219, 3399003, 220861580, 6086397307, 79879768821, 386032959689, 29317433209618, 852122544867919, 11206152487777257, 56509336646678083, 4391723268352660596, 130483481066218119340
OFFSET
1,3
COMMENTS
Column 3 of A199588
EXAMPLE
Some solutions for n=4
..0..0..0....0..0..1....0..0..1....0..0..0....0..1..1....0..1..1....0..0..1
..1..2..2....0..2..1....0..1..1....1..1..1....0..1..2....0..2..1....2..0..1
..1..1..2....2..2..1....2..2..2....2..2..2....0..2..2....0..2..2....2..2..1
..3..3..3....3..3..3....3..3..3....3..3..3....3..3..3....3..3..3....3..3..3
CROSSREFS
Sequence in context: A045563 A013339 A199360 * A093716 A117737 A062908
KEYWORD
nonn
AUTHOR
R. H. Hardin Nov 08 2011
STATUS
approved