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A207210 Number of 4Xn 0..2 arrays avoiding the pattern z-1 z-1 z in any row, column, nw-to-se diagonal or ne-to-sw antidiagonal 1
69, 4761, 193260, 7766709, 317286068, 12984008418, 532255213048, 21835412816853, 896199356290361, 36788855988407609, 1510305130233697178, 62003928383215093877, 2545527670668435810253, 104504881974943586269358 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Row 4 of A207208

LINKS

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

EXAMPLE

Some solutions for n=5

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

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

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

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

CROSSREFS

Sequence in context: A202978 A206859 A207204 * A206953 A206730 A207354

Adjacent sequences:  A207207 A207208 A207209 * A207211 A207212 A207213

KEYWORD

nonn

AUTHOR

R. H. Hardin Feb 15 2012

STATUS

approved

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Last modified May 28 09:09 EDT 2022. Contains 354112 sequences. (Running on oeis4.)