A222665 Number of nX7 0..3 arrays with exactly floor(nX7/2) elements unequal to at least one horizontal, vertical or antidiagonal neighbor, with new values introduced in row major 0..3 order

10, 446, 7624, 1058776, 33001473, 4437593254, 187359500736, 37621605140240, 2121341905081820, 520524918371948432, 32752399194222492694, 8549895451715446127450

Offset

1,1

Comments

Column 7 of A222666

Links

Table of n, a(n) for n=1..12.

Example

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

Crossrefs

Sequence in context: A350565 A001327 A288325 * A177391 A304289 A217523

Adjacent sequences: A222662 A222663 A222664 * A222666 A222667 A222668

Keyword

nonn

Author

R. H. Hardin Feb 28 2013

Status

approved