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A231250
Number of 5Xn 0..3 arrays x(i,j) with each element horizontally, diagonally or antidiagonally 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, 68, 3820, 76136, 1872136, 52280836, 1450042214, 39779238784, 1090961713992, 29949193448596, 822275707521646, 22574599504220086, 619748674764223478, 17014270643121556044, 467102227146870996978, 12823614103796550945194
OFFSET
1,2
COMMENTS
Row 5 of A231246
FORMULA
Empirical recurrence of order 62 (see link above)
EXAMPLE
Some solutions for n=2
..0..3....0..1....0..3....0..1....0..3....0..1....0..1....0..3....0..3....0..3
..2..1....2..3....2..1....2..3....2..1....2..3....2..3....0..1....0..1....0..1
..0..3....1..0....3..0....2..0....0..3....2..3....0..3....2..1....2..3....2..3
..2..1....3..2....1..0....1..0....2..3....0..1....0..1....2..3....2..3....2..1
..0..1....1..2....3..2....3..2....2..1....2..3....2..3....0..1....0..1....0..3
CROSSREFS
Sequence in context: A204298 A281556 A093268 * A159361 A004298 A223226
KEYWORD
nonn
AUTHOR
R. H. Hardin, Nov 06 2013
STATUS
approved