A198667 Number of n X 6 0..4 arrays with values 0..4 introduced in row major order and each element equal to one or two horizontal and vertical neighbors.

6, 2798, 1544783, 1382332582, 1169280626549

Offset

1,1

Comments

Column 6 of A198669.

Links

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

Example

Some solutions with all values 0 to 4 for n=3
..0..0..1..1..2..2....0..0..0..1..1..2....0..0..0..1..2..2....0..0..1..2..2..2
..0..0..3..3..2..4....0..1..1..3..1..2....0..3..3..1..4..1....0..1..1..3..4..4
..1..1..1..3..3..4....2..2..3..3..4..4....2..2..3..1..4..1....4..4..4..3..3..4

Crossrefs

Cf. A198669.

Sequence in context: A199147 A097871 A210004 * A225066 A001326 A300851

Adjacent sequences: A198664 A198665 A198666 * A198668 A198669 A198670

Keyword

nonn

Author

R. H. Hardin Oct 28 2011

Status

approved