A222578 Number of 6Xn 0..2 arrays with no more than floor(6Xn/2) elements unequal to at least one horizontal, diagonal or antidiagonal neighbor, with new values introduced in row major 0..2 order

122, 200, 5210, 50535, 881766, 14120189, 278335019, 5890042566, 140281638242

Offset

1,1

Comments

Row 6 of A222573

Links

Table of n, a(n) for n=1..9.

Example

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

Crossrefs

Sequence in context: A224606 A224599 A207147 * A105983 A356369 A099154

Adjacent sequences: A222575 A222576 A222577 * A222579 A222580 A222581

Keyword

nonn

Author

R. H. Hardin Feb 25 2013

Status

approved