A199195 Number of nX2 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 zero or two horizontal or vertical neighbors

1, 1, 14, 21, 424, 571, 14479, 18551, 541753, 677755, 21602174, 26710635, 900441480, 1106584141, 38750819148, 47454881357, 1708021796194, 2086972918493, 76696731839316, 93565751359627, 3495631904879766, 4259451181263175

Offset

1,3

Comments

Column 2 of A199201

Links

R. H. Hardin, Table of n, a(n) for n = 1..46

Example

Some solutions for n=4
..0..1....0..1....0..1....0..1....0..1....0..1....0..1....0..1....0..1....0..1
..1..2....2..3....2..3....1..0....2..3....2..0....2..3....2..0....2..0....1..2
..0..3....3..1....0..2....2..3....3..1....3..2....0..1....1..3....3..1....3..0
..3..2....0..2....3..1....3..2....2..0....1..3....3..2....3..2....2..3....2..3

Crossrefs

Sequence in context: A351689 A166628 A199250 * A291618 A266214 A113190

Adjacent sequences: A199192 A199193 A199194 * A199196 A199197 A199198

Keyword

nonn

Author

R. H. Hardin Nov 03 2011

Status

approved