A222880 Number of 3Xn 0..3 arrays with no more than floor(3Xn/2) elements equal to at least one horizontal or antidiagonal neighbor, with new values introduced in row major 0..3 order

5, 131, 6282, 409775, 19707855, 1340197778, 66248732403, 4552388850792, 228017377191609, 15767959380970741, 797585318305106129, 55339415802965980962, 2819443488435447752525, 196019624814751455019691

Offset

1,1

Comments

Row 3 of A222878

Links

R. H. Hardin, Table of n, a(n) for n = 1..22

Example

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

Crossrefs

Sequence in context: A142892 A229879 A145611 * A070247 A171375 A191409

Adjacent sequences: A222877 A222878 A222879 * A222881 A222882 A222883

Keyword

nonn

Author

R. H. Hardin Mar 08 2013

Status

approved