A210177 Number of (n+1)X3 0..3 arrays containing all values 0..3 with every 2X2 subblock having three or four distinct values, and new values 0..3 introduced in row major order

51, 2316, 79017, 2563795, 82255351, 2632469015, 84200356757, 2692825679001, 86117153792391, 2754026796151627, 88073648144059741, 2816590158892560329, 90074382683817260687, 2880573249877838455779, 92120555990382118611861

Offset

1,1

Comments

Column 2 of A210183

Links

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

Formula

Empirical: a(n) = 39*a(n-1) -211*a(n-2) -523*a(n-3) +2954*a(n-4) -1030*a(n-5) -4272*a(n-6) +2096*a(n-7) -192*a(n-8)

Example

Some solutions for n=4
..0..0..0....0..1..1....0..0..1....0..0..0....0..0..0....0..0..0....0..0..0
..1..2..1....1..2..3....1..2..3....1..2..1....1..2..1....1..2..1....1..2..1
..2..0..1....3..0..1....3..3..0....1..0..0....2..3..0....1..3..3....0..1..3
..0..1..2....1..1..2....0..1..2....1..2..3....1..3..1....3..2..0....2..2..1
..0..3..0....2..3..2....1..2..3....3..0..3....3..0..1....1..3..3....0..1..3

Crossrefs

Sequence in context: A288604 A278305 A231660 * A210080 A218752 A097836

Adjacent sequences: A210174 A210175 A210176 * A210178 A210179 A210180

Keyword

nonn

Author

R. H. Hardin Mar 18 2012

Status

approved