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A222771
Number of 3Xn 0..1 arrays with exactly floor(3Xn/2) elements unequal to at least one horizontal or antidiagonal neighbor, with new values introduced in row major 0..1 order
1
0, 4, 13, 66, 158, 934, 2446, 14567, 39972, 240130, 673665, 4073862, 11545686, 70212506, 200446066, 1224207384, 3512430906, 21526789216, 62001340484, 381049009426, 1100824791540, 6780941436208, 19637801359798, 121196222602133
OFFSET
1,2
COMMENTS
Row 3 of A222769
LINKS
EXAMPLE
Some solutions for n=3
..0..0..0....0..0..0....0..1..0....0..1..1....0..0..1....0..0..0....0..0..0
..0..0..0....0..0..0....0..0..0....0..1..1....1..0..0....0..0..1....0..0..1
..0..1..0....1..1..1....0..0..0....1..1..1....0..0..0....1..0..0....0..0..1
CROSSREFS
Sequence in context: A266096 A005035 A340452 * A052415 A129433 A157311
KEYWORD
nonn
AUTHOR
R. H. Hardin Mar 05 2013
STATUS
approved