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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

715, 4578580, 32271626438, 228847686794351, 1624001903270517563, 11525604443642285224422, 81798476241280856702695038, 580533377647449287012352167379, 4120113916814898485216382089787455

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OFFSET

1,1

COMMENTS

Column 7 of A208872

LINKS

R. H. Hardin, Table of n, a(n) for n = 1..210

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