A222686 Number of nX4 0..2 arrays with exactly floor(nX4/2) elements unequal to at least one horizontal or antidiagonal neighbor, with new values introduced in row major 0..2 order

3, 18, 220, 3189, 47696, 723244, 11082863, 171281610, 2665243912, 41702927217, 655500979620, 10342682216196, 163717383474715, 2598721367092734, 41349332751064456, 659312336958352181, 10532234884132194040

Offset

1,1

Comments

Column 4 of A222690

Links

R. H. Hardin, Table of n, a(n) for n = 1..183

Example

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

Crossrefs

Sequence in context: A279233 A071605 A340336 * A274271 A195765 A195766

Adjacent sequences: A222683 A222684 A222685 * A222687 A222688 A222689

Keyword

nonn

Author

R. H. Hardin Feb 28 2013

Status

approved