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A206210 Number of (n+1)X4 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
162, 336, 760, 2224, 5632, 14416, 40032, 101376, 259488, 720576, 1824768, 4670784, 12970368, 32845824, 84074112, 233466624, 591224832, 1513334016, 4202399232, 10642046976, 27240012288, 75643186176, 191556845568, 490320221184 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 3 of A206215

LINKS

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

FORMULA

Empirical: a(n) = 18*a(n-3) for n>6

EXAMPLE

Some solutions for n=4

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

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

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

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

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

CROSSREFS

Sequence in context: A045010 A085446 A274027 * A044985 A302283 A186844

Adjacent sequences:  A206207 A206208 A206209 * A206211 A206212 A206213

KEYWORD

nonn

AUTHOR

R. H. Hardin Feb 04 2012

STATUS

approved

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Last modified January 18 00:43 EST 2022. Contains 350410 sequences. (Running on oeis4.)