A206385 Number of nX4 0..6 arrays with no element equal to another within a city block distance of two, and new values 0..6 introduced in row major order

2, 33, 1368, 67716, 3328979, 164270604, 8094257014, 399073153303, 19671060879306, 969710249315342, 47801400299066037, 2356379708874988482, 116157573684573753928, 5725991875022057193833, 282262740672653624738188

Offset

1,1

Comments

Column 4 of A206389

Links

R. H. Hardin, Table of n, a(n) for n = 1..29

Example

Some solutions for n=4
..0..1..2..0....0..1..2..3....0..1..2..3....0..1..2..3....0..1..2..0
..2..3..4..5....3..4..5..6....2..3..4..5....2..3..4..5....2..3..4..5
..1..5..6..3....6..2..0..1....1..5..6..0....4..5..0..6....5..6..0..1
..0..2..1..4....0..1..3..2....3..4..1..2....6..1..3..4....4..1..5..6

Crossrefs

Sequence in context: A204239 A198901 A242621 * A263052 A090335 A302452

Adjacent sequences: A206382 A206383 A206384 * A206386 A206387 A206388

Keyword

nonn

Author

R. H. Hardin Feb 07 2012

Status

approved