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A222681
Number of 3Xn 0..3 arrays with no more than floor(3Xn/2) elements unequal to at least one horizontal, diagonal or antidiagonal neighbor, with new values introduced in row major 0..3 order
0
5, 5, 11, 58, 142, 2398, 6463, 146947, 401552, 9871237, 27759999, 675112590, 1962193874, 46428879519, 139050595341, 3201678397354, 9862902257940, 221229238222335, 700012077054917
OFFSET
1,1
COMMENTS
Row 3 of A222679
EXAMPLE
Some solutions for n=3
..0..1..2....0..1..1....0..0..0....0..0..0....0..0..1....0..1..0....0..0..0
..1..1..1....1..1..1....0..0..0....0..0..0....0..0..0....1..1..1....1..0..0
..1..1..1....1..1..1....0..0..0....0..0..1....0..0..0....1..1..1....0..0..0
CROSSREFS
Sequence in context: A242325 A098331 A222575 * A061391 A168336 A123133
KEYWORD
nonn
AUTHOR
R. H. Hardin Feb 28 2013
STATUS
approved