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A206501
Number of nX4 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
0
2, 34, 3130, 502599, 83045488, 13752277898, 2277207309720, 377099217207514, 62445595052884887, 10340702774554689140, 1712370276674504142791, 283560339737534813492944
OFFSET
1,1
COMMENTS
Column 4 of A206503
EXAMPLE
Some solutions for n=4
..0..1..2..0....0..1..2..0....0..1..2..0....0..1..2..0....0..1..2..0
..2..3..4..5....2..3..4..5....2..3..4..5....2..3..4..1....2..3..4..1
..4..5..6..3....1..0..6..1....4..0..6..1....4..5..6..7....1..5..6..7
..6..7..1..4....5..4..2..3....1..2..3..7....7..0..3..2....3..4..1..0
CROSSREFS
Sequence in context: A216082 A165938 A255434 * A183414 A002782 A155205
KEYWORD
nonn
AUTHOR
R. H. Hardin Feb 08 2012
STATUS
approved