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A206321 Number of (n+1)X3 0..3 arrays with every 2X3 or 3X2 subblock having exactly three clockwise edge increases 1
1344, 16892, 282996, 4796092, 81302880, 1377662868, 23340152044, 395403752128, 6698395782004, 113474612575628, 1922321318016168, 32565148864444732, 551670927155642340, 9345598309321513584, 158319393789428735572 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 2 of A206327

LINKS

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

FORMULA

Empirical: a(n) = 24*a(n-1) -131*a(n-2) +200*a(n-3) -116*a(n-4) +35*a(n-5) -13*a(n-6) +2*a(n-7) for n>10

EXAMPLE

Some solutions for n=4

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

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

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

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

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

CROSSREFS

Sequence in context: A205820 A202430 A268907 * A230974 A239192 A172686

Adjacent sequences:  A206318 A206319 A206320 * A206322 A206323 A206324

KEYWORD

nonn

AUTHOR

R. H. Hardin Feb 06 2012

STATUS

approved

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Last modified December 2 05:01 EST 2021. Contains 349437 sequences. (Running on oeis4.)