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A210399 Number of (n+1)X4 0..3 arrays with every 2X2 subblock having one or three distinct values, and new values 0..3 introduced in row major order 1
549, 29647, 1596154, 85979301, 4631193134, 249456180709, 13436785945910, 723763304576749, 38985016148233742, 2099901274580672917, 113109748262417625254, 6092579354615210957373, 328172626696350857253566 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 3 of A210404

LINKS

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

FORMULA

Empirical: a(n) = 65*a(n-1) -483*a(n-2) -7397*a(n-3) +54220*a(n-4) +315572*a(n-5) -1567384*a(n-6) -4952640*a(n-7) +15991008*a(n-8) +21762048*a(n-9) -51440128*a(n-10) -13774848*a(n-11) +33619968*a(n-12)

EXAMPLE

Some solutions for n=4

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

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

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

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

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

CROSSREFS

Sequence in context: A235829 A235834 A235585 * A232314 A141547 A236723

Adjacent sequences:  A210396 A210397 A210398 * A210400 A210401 A210402

KEYWORD

nonn

AUTHOR

R. H. Hardin Mar 21 2012

STATUS

approved

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Last modified January 18 02:49 EST 2021. Contains 340249 sequences. (Running on oeis4.)