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A206209 Number of (n+1)X3 0..2 arrays with every 2X3 or 3X2 subblock having exactly two equal edges, and new values 0..2 introduced in row major order 1
45, 130, 336, 992, 2996, 9072, 27656, 84152, 256416, 781232, 2379776, 7251312, 22090736, 67305392, 205057296, 624739472, 1903397456, 5799009552, 17667779216, 53828031632, 163996770576, 499645981712, 1522260939536, 4637843595792 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 2 of A206215

LINKS

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

FORMULA

Empirical: a(n) = a(n-1) +6*a(n-2) +4*a(n-3) -10*a(n-4) for n>6

EXAMPLE

Some solutions for n=4

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

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

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

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

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

CROSSREFS

Sequence in context: A140369 A044296 A044677 * A098924 A195318 A131011

Adjacent sequences:  A206206 A206207 A206208 * A206210 A206211 A206212

KEYWORD

nonn

AUTHOR

R. H. Hardin Feb 04 2012

STATUS

approved

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Last modified December 21 07:50 EST 2014. Contains 252297 sequences.