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A199126
Number of nX1 0..2 arrays with values 0..2 introduced in row major order, the number of instances of each value within one of each other, and no element equal to any horizontal or vertical neighbor
2
1, 1, 1, 3, 6, 5, 19, 37, 29, 124, 240, 182, 834, 1614, 1198, 5746, 11137, 8142, 40336, 78332, 56620, 287358, 559134, 400598, 2071558, 4038130, 2872754, 15079270, 29443040, 20824778, 110653854, 216379650, 152303410, 817542980, 1600817660
OFFSET
1,4
COMMENTS
Column 1 of A199133
LINKS
FORMULA
Conjecture: a(3n) = A190917(n). - R. J. Mathar, Nov 01 2015
EXAMPLE
All solutions for n=5
..0....0....0....0....0....0
..1....1....1....1....1....1
..2....2....2....0....2....0
..0....1....0....2....1....1
..2....2....1....1....0....2
CROSSREFS
Sequence in context: A334748 A334079 A328403 * A247569 A115389 A303564
KEYWORD
nonn
AUTHOR
R. H. Hardin Nov 03 2011
STATUS
approved