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A209910 Half the number of (n+1)X6 0..3 arrays with every 2X2 subblock having two or four distinct clockwise edge differences 1
399930, 152153160, 53888573444, 19391662870652, 6954596004028468, 2497054784947973388, 896278100477366851795, 321743305461455008300382, 115494087693753318505527463, 41458747023669964452852387044 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 5 of A209913

LINKS

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

EXAMPLE

Some solutions for n=4

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

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

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

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

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

CROSSREFS

Sequence in context: A209784 A015424 A083634 * A190837 A205094 A234419

Adjacent sequences:  A209907 A209908 A209909 * A209911 A209912 A209913

KEYWORD

nonn

AUTHOR

R. H. Hardin Mar 15 2012

STATUS

approved

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Last modified May 29 08:08 EDT 2022. Contains 354122 sequences. (Running on oeis4.)