A206966 - OEIS

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A206966

Number of nX7 0..3 arrays avoiding the pattern z z+1 z in any row, column or nw-to-se diagonal

0

12793, 163660849, 1226952447969, 8992951964423491, 66983278347851911670, 499734187386667201802301, 3726713206845504722090161857

(list; graph; refs; listen; history; text; internal format)

OFFSET

1,1

COMMENTS

Column 7 of A206967

LINKS

Table of n, a(n) for n=1..7.

EXAMPLE

Some solutions for n=4

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

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

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

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

CROSSREFS

Sequence in context: A184784 A184780 A206796 * A209091 A207133 A157509

Adjacent sequences: A206963 A206964 A206965 * A206967 A206968 A206969

KEYWORD

nonn

AUTHOR

R. H. Hardin Feb 14 2012

STATUS

approved