A222689 Number of nX7 0..2 arrays with exactly floor(nX7/2) elements unequal to at least one horizontal or antidiagonal neighbor, with new values introduced in row major 0..2 order

10, 784, 25642, 3056797, 126928736, 18253875506, 832227066041, 125067423389467, 5853920434490847, 892160813906817986, 42242385262760099184, 6488373830482943076081, 309430010760744167416957

Offset

1,1

Comments

Column 7 of A222690

Links

R. H. Hardin, Table of n, a(n) for n = 1..47

Example

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

Crossrefs

Sequence in context: A108243 A323494 A159709 * A242373 A221045 A015057

Adjacent sequences: A222686 A222687 A222688 * A222690 A222691 A222692

Keyword

nonn

Author

R. H. Hardin Feb 28 2013

Status

approved