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A240366
Number of 3Xn 0..3 arrays with no element equal to one plus the sum of elements to its left or two plus the sum of the elements above it or two plus the sum of the elements diagonally to its northwest, modulo 4
1
7, 43, 257, 1693, 10997, 74255, 492758, 3349106, 22433886, 152643539, 1027272805, 6985683412, 47128486230, 320193692690, 2163219506254, 14685211888947, 99300200123859, 673693197611946, 4558092645337083, 30910190288935629
OFFSET
1,1
COMMENTS
Row 3 of A240364
FORMULA
Empirical recurrence of order 80 (see link above)
EXAMPLE
Some solutions for n=4
..3..1..3..1....0..3..3..1....0..3..3..0....0..0..0..0....0..0..0..0
..0..2..2..2....0..0..2..0....0..0..0..0....3..3..0..1....0..3..1..3
..3..3..1..2....0..0..0..0....0..0..0..0....0..0..0..0....3..3..2..2
CROSSREFS
Sequence in context: A161728 A358682 A271197 * A329018 A003464 A022036
KEYWORD
nonn
AUTHOR
R. H. Hardin, Apr 04 2014
STATUS
approved