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A207227 Number of nX7 0..2 arrays avoiding the patterns z z+1 z or z z-1 z in any row, column or nw-se diagonal 1
1121, 1256641, 312522517, 125372637881, 47644493869633, 17182219699443153, 6152504033864688529, 2210806175420208130713, 798188687605046033604289, 288544627150883247074217513, 104252111969644072548865787265 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 7 of A207228

LINKS

R. H. Hardin, Table of n, a(n) for n = 1..20

EXAMPLE

Some solutions for n=4

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

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

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

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

CROSSREFS

Sequence in context: A225995 A122052 A207234 * A207014 A203189 A317962

Adjacent sequences:  A207224 A207225 A207226 * A207228 A207229 A207230

KEYWORD

nonn

AUTHOR

R. H. Hardin Feb 16 2012

STATUS

approved

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Last modified August 10 04:38 EDT 2020. Contains 336368 sequences. (Running on oeis4.)