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A186065 Number of (n+2)X4 0..2 arrays with each 3X3 subblock having a positive determinant 1
85950, 2594364, 73704654, 1983108841, 56342354623, 1583479136326, 43674791825894, 1227206096949087, 34442516744766780, 955566424195215926, 26758623787941625854, 750296625321555194450, 20875762248134838402638 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 2 of A186068

LINKS

R. H. Hardin, Table of n, a(n) for n = 1..200

EXAMPLE

Some solutions for 6X4

..0..1..0..0....0..1..0..0....0..1..0..0....0..1..0..0....0..1..0..0

..0..0..1..0....0..0..1..0....0..0..1..0....0..0..1..0....0..0..1..0

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

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

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

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

CROSSREFS

Sequence in context: A253531 A179575 A234805 * A238309 A203388 A206657

Adjacent sequences:  A186062 A186063 A186064 * A186066 A186067 A186068

KEYWORD

nonn

AUTHOR

R. H. Hardin Feb 11 2011

STATUS

approved

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Last modified August 7 06:02 EDT 2020. Contains 336274 sequences. (Running on oeis4.)