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A207478 Number of nX7 0..3 arrays avoiding the patterns z z+1 z or z z-1 z in any row, column or nw-se diagonal 0
10686, 114190596, 415949940602, 1897778216001770, 8467264566580418754, 37628798991659309387420 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 7 of A207479

LINKS

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

EXAMPLE

Some solutions for n=4

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

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

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

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

CROSSREFS

Sequence in context: A257428 A254237 A207282 * A207534 A238067 A184603

Adjacent sequences:  A207475 A207476 A207477 * A207479 A207480 A207481

KEYWORD

nonn

AUTHOR

R. H. Hardin Feb 18 2012

STATUS

approved

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Last modified October 2 23:51 EDT 2022. Contains 357230 sequences. (Running on oeis4.)