A206502 Number of nX5 0..7 arrays with no element equal to another within a city block distance of two, and new values 0..7 introduced in row major order.
5, 481, 178998, 83045488, 38638317841
Offset: 1
Keywords
Examples
Some solutions for n=4 ..0..1..2..3..0....0..1..2..0..1....0..1..2..0..1....0..1..2..3..0 ..2..3..0..1..2....2..3..4..5..6....2..3..4..5..2....2..3..0..1..2 ..4..5..6..4..7....1..5..7..1..2....4..0..1..6..3....4..5..6..7..3 ..0..7..1..5..3....0..2..3..0..4....1..2..3..7..4....1..7..2..0..4
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