A223111 Number of nX3 0..2 arrays with exactly floor(nX3/2) elements equal to at least one horizontal, diagonal or antidiagonal neighbor, with new values introduced in row major 0..3 order

0, 28, 269, 6676, 92011, 2301900, 32735497, 837862668, 12106093706, 313968808894, 4581445250150, 119890333249076, 1761283412315382, 46388661759948448, 684833319605211085, 18124812585709761616, 268573609604134968276

Offset

1,2

Comments

Column 3 of A223114

Links

R. H. Hardin, Table of n, a(n) for n = 1..210

Example

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

Crossrefs

Sequence in context: A172214 A093196 A179098 * A065693 A349861 A159883

Adjacent sequences: A223108 A223109 A223110 * A223112 A223113 A223114

Keyword

nonn

Author

R. H. Hardin Mar 14 2013

Status

approved