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A206953 Number of nX4 0..2 arrays avoiding the pattern z z+1 z in any row, column or nw-to-se diagonal 1
69, 4761, 218637, 9803278, 449797912, 20694430627, 950821989599, 43676385937074, 2006497292305518, 92180116069921220, 4234783426805045787, 194547099770290413016, 8937559013725835053331, 410594472108308448412855 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 4 of A206957

LINKS

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

EXAMPLE

Some solutions for n=4

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

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

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

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

CROSSREFS

Sequence in context: A206859 A207204 A207210 * A206730 A207354 A207985

Adjacent sequences:  A206950 A206951 A206952 * A206954 A206955 A206956

KEYWORD

nonn

AUTHOR

R. H. Hardin Feb 13 2012

STATUS

approved

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Last modified September 29 03:50 EDT 2022. Contains 357082 sequences. (Running on oeis4.)