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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 1
2, 33, 1368, 67716, 3328979, 164270604, 8094257014, 399073153303, 19671060879306, 969710249315342, 47801400299066037, 2356379708874988482, 116157573684573753928, 5725991875022057193833, 282262740672653624738188 (list; graph; refs; listen; history; text; internal format)
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

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Last modified June 23 18:45 EDT 2021. Contains 345402 sequences. (Running on oeis4.)