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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
1
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
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
KEYWORD
nonn
AUTHOR
R. H. Hardin Mar 09 2013
STATUS
approved