A222678 Number of nX7 0..3 arrays with no more than floor(nX7/2) elements unequal to at least one horizontal, diagonal or antidiagonal neighbor, with new values introduced in row major 0..3 order.

17, 359, 6463, 687222, 20997839, 3254033272, 169563633880, 40055385632924, 2635079897572698, 708119862583697101, 48390899167019147315

Offset: 1

Author

R. H. Hardin Feb 28 2013

Keywords

• nonn

Comments

Column 7 of A222679

Examples

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