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A231582
Number of nX3 0..3 arrays with no element less than a strict majority of its horizontal, vertical, diagonal and antidiagonal neighbors
1
16, 124, 2352, 32650, 381076, 5618444, 82479418, 1142396851, 16061107556, 231334122108, 3304782498636, 47013530431780, 672506204379038, 9632530214937964, 137769361857359282, 1971267194035271726
OFFSET
1,1
COMMENTS
Column 3 of A231586
FORMULA
Empirical recurrence of order 72 (see link above)
EXAMPLE
Some solutions for n=4
..1..0..0....3..0..1....1..0..3....0..2..3....2..2..1....2..3..1....1..1..1
..0..0..3....0..0..0....0..0..0....0..0..2....1..0..0....2..1..1....2..1..1
..0..3..0....0..0..0....3..0..1....0..0..3....0..0..0....0..0..3....3..1..1
..2..0..0....3..3..3....0..0..0....0..1..2....0..3..0....0..0..0....2..1..1
CROSSREFS
Sequence in context: A060633 A125353 A126511 * A067442 A000485 A264625
KEYWORD
nonn
AUTHOR
R. H. Hardin, Nov 11 2013
STATUS
approved