A223103 Number of nX7 0..2 arrays with exactly floor(nX7/2) elements equal to at least one horizontal or antidiagonal neighbor, with new values introduced in row major 0..2 order

40, 86726, 82588214, 123093376161, 117100753812154, 184306007437994168, 178267875091681095647, 288566059811920090049247, 282038738466075495882497447, 464271472626735070305392948832

Offset

1,1

Comments

Column 7 of A223104

Links

R. H. Hardin, Table of n, a(n) for n = 1..27

Example

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

Crossrefs

Sequence in context: A159404 A323489 A266157 * A186166 A151605 A253107

Adjacent sequences: A223100 A223101 A223102 * A223104 A223105 A223106

Keyword

nonn

Author

R. H. Hardin Mar 14 2013

Status

approved