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A208871
Number of nX7 0..3 arrays with new values 0..3 introduced in row major order and no element equal to more than one of its immediate leftward or upward or right-upward antidiagonal neighbors
1
715, 4578580, 32271626438, 228847686794351, 1624001903270517563, 11525604443642285224422, 81798476241280856702695038, 580533377647449287012352167379, 4120113916814898485216382089787455
OFFSET
1,1
COMMENTS
Column 7 of A208872
LINKS
EXAMPLE
Some solutions for n=4
..0..0..0..0..0..0..0....0..1..1..2..0..1..0....0..0..0..0..1..2..1
..1..2..1..1..1..1..1....0..0..0..3..0..1..1....1..1..1..2..1..3..3
..1..0..3..2..2..2..3....2..1..2..2..1..0..3....2..2..0..2..2..1..2
..3..0..3..3..3..0..1....2..3..0..2..3..0..0....0..1..1..0..2..3..0
CROSSREFS
Sequence in context: A208352 A223061 A208863 * A208878 A208174 A200800
KEYWORD
nonn
AUTHOR
R. H. Hardin Mar 02 2012
STATUS
approved