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A210168 Number of (n+1)X3 0..3 arrays containing all values 0..3 with every 2X2 subblock having two or four distinct values, and new values 0..3 introduced in row major order 1
10, 201, 3283, 48577, 679253, 9173091, 121178151, 1578188865, 20364553277, 261193130859, 3336758862031, 42516443800121, 540813127075381, 6871496034443795, 87244283342152055, 1107170119794198769 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 2 of A210174

LINKS

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

FORMULA

Empirical: a(n) = 32*a(n-1) -362*a(n-2) +1648*a(n-3) -1561*a(n-4) -7568*a(n-5) +11440*a(n-6) +11360*a(n-7) -14768*a(n-8) -6400*a(n-9) +3840*a(n-10)

EXAMPLE

Some solutions for n=4

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

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

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

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

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

CROSSREFS

Sequence in context: A178020 A279833 A041183 * A041180 A027014 A088746

Adjacent sequences:  A210165 A210166 A210167 * A210169 A210170 A210171

KEYWORD

nonn

AUTHOR

R. H. Hardin Mar 18 2012

STATUS

approved

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Last modified November 12 21:22 EST 2019. Contains 329079 sequences. (Running on oeis4.)