A199200 Number of nX7 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

41, 14479, 3366282, 351517665, 533423159945

Offset

1,1

Comments

Column 7 of A199201

Links

Table of n, a(n) for n=1..5.

Example

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

Crossrefs

Sequence in context: A106203 A289416 A199255 * A198602 A214338 A084275

Adjacent sequences: A199197 A199198 A199199 * A199201 A199202 A199203

Keyword

nonn

Author

R. H. Hardin Nov 03 2011

Status

approved