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A231061
Number of nX6 0..3 arrays x(i,j) with each element horizontally or vertically next to at least one element with value (x(i,j)+1) mod 4, no adjacent elements equal, and upper left element zero
1
0, 230, 7818, 313944, 12582344, 505135612, 20286249268, 814871303100, 32735101347962, 1315094209121840, 52833398277964844, 2122581619644690616, 85275101975137588046, 3425950358334849580350, 137638633914499167727240
OFFSET
1,2
COMMENTS
Column 6 of A231063
LINKS
EXAMPLE
Some solutions for n=4
..0..1..2..0..3..2....0..1..0..3..0..1....0..1..0..3..2..1....0..1..0..2..1..0
..3..0..3..1..0..3....1..2..3..2..1..2....1..2..3..2..1..0....3..2..1..3..2..1
..0..1..0..2..3..2....0..1..0..3..2..3....0..1..0..1..0..3....2..1..3..0..1..0
..3..2..1..0..2..1....1..2..3..0..1..0....3..2..3..0..1..2....3..0..2..3..0..3
CROSSREFS
Sequence in context: A194490 A232379 A333136 * A231107 A231251 A051183
KEYWORD
nonn
AUTHOR
R. H. Hardin, Nov 03 2013
STATUS
approved