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A210080 Number of (n+1)X3 0..3 arrays containing all values 0..3 with every 2X2 subblock having one, three or four distinct values, and new values 0..3 introduced in row major order 1
51, 2384, 82691, 2718363, 88297042, 2860160370, 92588511903, 2996810715343, 96994366574290, 3139281183878814, 101604539088581047, 3288484612764581771, 106433531904417302770, 3444777087479400101786, 111492016707498418375743 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 2 of A210086

LINKS

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

FORMULA

Empirical: a(n) = 42*a(n-1) -322*a(n-2) +274*a(n-3) +1887*a(n-4) -3124*a(n-5) +76*a(n-6) +1168*a(n-7)

EXAMPLE

Some solutions for n=4

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

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

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

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

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

CROSSREFS

Sequence in context: A278305 A231660 A210177 * A218752 A097836 A267786

Adjacent sequences:  A210077 A210078 A210079 * A210081 A210082 A210083

KEYWORD

nonn

AUTHOR

R. H. Hardin Mar 17 2012

STATUS

approved

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Last modified December 15 11:43 EST 2019. Contains 329999 sequences. (Running on oeis4.)