A222902 Number of nX4 0..3 arrays with no more than floor(nX4/2) elements unequal to at least one horizontal or antidiagonal neighbor, with new values introduced in row major 0..3 order

4, 25, 373, 7794, 180203, 4320431, 105327353, 2592612272, 64243363904, 1600125512239, 40022606753953, 1004596097977296, 25292398905119297, 638445931307999125, 16152880969313405490, 409495374971029069517

Offset

1,1

Comments

Column 4 of A222906

Links

R. H. Hardin, Table of n, a(n) for n = 1..136

Example

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

Crossrefs

Sequence in context: A259591 A093959 A308476 * A086216 A167041 A123129

Adjacent sequences: A222899 A222900 A222901 * A222903 A222904 A222905

Keyword

nonn

Author

R. H. Hardin Mar 09 2013

Status

approved