A208199 Number of nX6 0..3 arrays with new values 0..3 introduced in row major order and no element equal to more than two of its immediate leftward or upward or left-upward diagonal neighbors

187, 648569, 2468504665, 9402035642924, 35810971705853725, 136398703432330477549, 519522527116810577984260, 1978784616446414312287693835, 7536898505819261464135073030914

Offset

1,1

Comments

Column 6 of A208201

Links

R. H. Hardin, Table of n, a(n) for n = 1..210

Example

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

Crossrefs

Sequence in context: A208173 A200799 A241118 * A208406 A208413 A198905

Adjacent sequences: A208196 A208197 A208198 * A208200 A208201 A208202

Keyword

nonn

Author

R. H. Hardin Feb 24 2012

Status

approved