A199145 Number of nX4 0..3 arrays with values 0..3 introduced in row major order and each element equal to one or two horizontal and vertical neighbors

2, 65, 2453, 125468, 6235011, 316561994, 15958823113, 806680624447, 40736752748774, 2057896226081573, 103945296750116087, 5250572116269762125, 265216743260845702081, 13396704712673136390007, 676696655003807234547723

Offset

1,1

Comments

Column 4 of A199149

Links

R. H. Hardin, Table of n, a(n) for n = 1..200

Example

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

Crossrefs

Sequence in context: A294179 A002604 A294273 * A198665 A185029 A228081

Adjacent sequences: A199142 A199143 A199144 * A199146 A199147 A199148

Keyword

nonn

Author

R. H. Hardin Nov 03 2011

Status

approved