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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
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
KEYWORD
nonn
AUTHOR
R. H. Hardin Mar 17 2012
STATUS
approved

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Last modified February 21 22:50 EST 2024. Contains 370239 sequences. (Running on oeis4.)