A209181 Number of nX3 1..6 arrays with no element with value z exactly a city block distance of z from another element with value z

199, 31185, 3873287, 364261071, 24175529937, 1165940695438

Offset

1,1

Comments

Column 3 of A209182

Links

Table of n, a(n) for n=1..6.

Example

Some solutions for n=5
..2..6..4....5..1..6....3..5..4....4..4..6....2..2..6....3..4..2....6..5..1
..2..3..3....1..5..4....1..5..5....1..4..1....5..3..3....1..4..4....3..5..6
..6..6..1....4..1..6....2..4..6....5..6..2....4..5..2....3..4..5....6..5..2
..4..1..6....5..4..1....5..3..3....5..6..6....1..5..4....6..1..2....1..4..2
..6..2..1....1..6..2....4..4..3....5..5..5....2..2..6....3..5..5....4..4..1

Crossrefs

Sequence in context: A153179 A269549 A324436 * A298251 A097732 A305413

Adjacent sequences: A209178 A209179 A209180 * A209182 A209183 A209184

Keyword

nonn

Author

R. H. Hardin Mar 05 2012

Status

approved