A200799 Number of n X 6 0..3 arrays with values 0..3 introduced in row major order and each element equal to no more than two horizontal and vertical neighbors.

187, 622645, 2060918000, 6852264918471, 22781978610167987, 75743730886453371522, 251826890612151285556718, 837254535307721417534184492, 2783639010978210077196779661724

Offset

1,1

Comments

Column 6 of A200801.

Links

R. H. Hardin, Table of n, a(n) for n = 1..28

Example

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

Crossrefs

Cf. A200801.

Sequence in context: A208870 A208877 A208173 * A241118 A208199 A208406

Adjacent sequences: A200796 A200797 A200798 * A200800 A200801 A200802

Keyword

nonn

Author

R. H. Hardin, Nov 22 2011

Status

approved