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A206690 Number of nX6 0..3 arrays with no element equal to another within two positions in the same row or column, and new values 0..3 introduced in row major order 1
8, 376, 2816, 24492, 213788, 1915580, 17277556, 156946368, 1429962032, 13057140562, 119353104128, 1091748256156, 9990044761998, 91434371494388, 836958605238016, 7661779056726008, 70141114109343664, 642134221496445414 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 6 of A206692

LINKS

R. H. Hardin, Table of n, a(n) for n = 1..210

EXAMPLE

Some solutions for n=4

..0..1..2..3..1..0....0..1..2..3..1..2....0..1..2..0..1..3....0..1..2..3..1..0

..2..3..1..0..2..1....1..0..3..1..0..3....1..0..3..1..2..0....2..3..1..2..3..1

..1..2..3..1..0..3....2..3..0..2..3..1....3..2..1..3..0..1....1..2..0..1..2..3

..0..1..2..3..1..0....3..1..2..3..1..2....0..1..2..0..1..2....3..0..2..3..1..2

CROSSREFS

Sequence in context: A240380 A038016 A221775 * A349114 A266920 A072447

Adjacent sequences:  A206687 A206688 A206689 * A206691 A206692 A206693

KEYWORD

nonn

AUTHOR

R. H. Hardin Feb 11 2012

STATUS

approved

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Last modified August 16 11:28 EDT 2022. Contains 356168 sequences. (Running on oeis4.)