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A222796
Number of 3Xn 0..3 arrays with exactly floor(3Xn/2) elements unequal to at least one horizontal or antidiagonal neighbor, with new values introduced in row major 0..3 order
1
0, 8, 34, 275, 888, 14292, 62072, 1144030, 5213239, 98670352, 454254970, 8668405392, 40062023836, 768672153916, 3564115006844, 68657814382115, 319237701630821, 6169004369711478, 28754090389217238, 557059581178953846
OFFSET
1,2
COMMENTS
Row 3 of A222794
LINKS
EXAMPLE
Some solutions for n=3
..0..1..1....0..1..0....0..1..1....0..0..0....0..0..0....0..0..0....0..0..0
..1..1..1....1..1..1....2..1..1....0..0..1....0..0..1....0..0..0....0..0..1
..1..1..2....1..1..1....1..1..1....2..2..2....1..0..0....0..1..0....0..0..1
CROSSREFS
Sequence in context: A252934 A229398 A223015 * A203445 A318244 A280395
KEYWORD
nonn
AUTHOR
R. H. Hardin Mar 05 2013
STATUS
approved