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A199129
Number of nX4 0..2 arrays with values 0..2 introduced in row major order, the number of instances of each value within one of each other, and no element equal to any horizontal or vertical neighbor
2
3, 12, 19, 258, 1409, 2836, 48320, 295092, 629776, 11499816, 73045294, 159683856, 3012721252, 19537447260, 43276955012, 832789320948, 5471578311520, 12222775051564, 238366172778672, 1580313985819656, 3551105861275344
OFFSET
1,1
COMMENTS
Column 4 of A199133
LINKS
EXAMPLE
Some solutions for n=5
..0..1..0..2....0..1..0..1....0..1..2..1....0..1..2..1....0..1..2..0
..1..0..2..1....2..0..2..0....2..0..1..2....2..0..1..2....1..2..0..2
..2..1..0..2....1..2..1..2....0..2..0..1....1..2..0..1....2..1..2..1
..1..0..2..1....0..1..2..1....2..0..1..2....2..0..1..0....0..2..1..0
..0..2..1..0....1..2..0..2....0..2..0..1....0..1..0..2....2..1..0..1
CROSSREFS
Sequence in context: A117554 A049714 A363639 * A257942 A063244 A344015
KEYWORD
nonn
AUTHOR
R. H. Hardin Nov 03 2011
STATUS
approved