A210056 Number of (n+1)X4 0..3 arrays with every 2X2 subblock having one, two or four distinct values, and new values 0..3 introduced in row major order

323, 8767, 249327, 7293673, 216648913, 6488330257, 195167694929, 5884233366145, 177625392358041, 5365403487412033, 162124641816433033, 4899758491985350801, 148095589348943563865, 4476428973391833738241, 135310961550376342507401

Offset

1,1

Comments

Column 3 of A210061

Links

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

Formula

Empirical: a(n) = 66*a(n-1) -1511*a(n-2) +14904*a(n-3) -58950*a(n-4) +21360*a(n-5) +330508*a(n-6) -503712*a(n-7) -93160*a(n-8) +369120*a(n-9) -9504*a(n-10) -69120*a(n-11)

Example

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

Crossrefs

Sequence in context: A213289 A094409 A253708 * A202984 A346387 A110709

Adjacent sequences: A210053 A210054 A210055 * A210057 A210058 A210059

Keyword

nonn

Author

R. H. Hardin Mar 16 2012

Status

approved