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A206205 Number of (n+1)X8 0..3 arrays with every 2X3 or 3X2 subblock having exactly one clockwise edge increases 1
468968, 192808, 145208, 337896, 713408, 1080648, 3270240, 7008160, 10936160, 33660800, 72736960, 113216800, 339966080, 729156480, 1132733728, 3399739520, 7291568000, 11327337280, 33997395200, 72915680000, 113273372800 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 7 of A206206

LINKS

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

FORMULA

Empirical: a(n) = 10*a(n-3) for n>17

EXAMPLE

Some solutions for n=4

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

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

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

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

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

CROSSREFS

Sequence in context: A238045 A341152 A096889 * A227767 A328255 A092010

Adjacent sequences:  A206202 A206203 A206204 * A206206 A206207 A206208

KEYWORD

nonn

AUTHOR

R. H. Hardin Feb 04 2012

STATUS

approved

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Last modified October 27 09:55 EDT 2021. Contains 348274 sequences. (Running on oeis4.)