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A198977
Number of nX3 0..5 arrays with values 0..5 introduced in row major order and no element equal to any horizontal or vertical neighbor
2
2, 34, 1835, 146286, 12662226, 1112962873, 98102456246, 8651794282083, 763087851014929, 67305520316532514, 5936469991284318525, 523607833526831199696, 46183202315902474606576, 4073445973766659727007243
OFFSET
1,1
COMMENTS
Column 3 of A198982
LINKS
FORMULA
Empirical: a(n) = 116*a(n-1) -2685*a(n-2) +21394*a(n-3) -74475*a(n-4) +117904*a(n-5) -80343*a(n-6) +18090*a(n-7)
EXAMPLE
Some solutions with all values from 0 to 5 for n=4
..0..1..2....0..1..2....0..1..2....0..1..2....0..1..2....0..1..0....0..1..2
..3..2..1....3..4..0....3..4..0....3..2..1....3..2..1....2..0..1....3..0..4
..0..4..5....1..0..2....4..5..1....1..0..4....4..1..5....3..2..3....0..2..0
..3..5..3....5..3..4....1..3..4....5..1..0....3..0..4....0..4..5....3..5..2
CROSSREFS
Sequence in context: A171732 A291903 A340863 * A198718 A198909 A207865
KEYWORD
nonn
AUTHOR
R. H. Hardin Nov 01 2011
STATUS
approved