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

1,1

Comments

Column 7 of A222679

Links

Table of n, a(n) for n=1..11.

Example

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

Crossrefs

Sequence in context: A081421 A121824 A120287 * A293691 A365678 A002197

Adjacent sequences: A222675 A222676 A222677 * A222679 A222680 A222681

Keyword

nonn

Author

R. H. Hardin Feb 28 2013

Status

approved