A206056 Number of (n+1)X2 0..3 arrays with every 2X3 or 3X2 subblock having exactly two clockwise edge increases

256, 2184, 19832, 170688, 1499080, 13136860, 114770680, 1005245456, 8795691276, 76969708228, 673648635636, 5895121182756, 51591036898624, 451495015540276, 3951196323981332, 34578562282564776, 302610603775464632

Offset

1,1

Comments

Column 1 of A206063

Links

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

Formula

Empirical: a(n) = 3*a(n-1) +34*a(n-2) +145*a(n-3) -18*a(n-4) -2*a(n-5) +11*a(n-6) +6*a(n-7) +2*a(n-8) +4*a(n-9) for n>10

Example

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

Crossrefs

Sequence in context: A237069 A346961 A206063 * A207799 A207792 A236500

Adjacent sequences: A206053 A206054 A206055 * A206057 A206058 A206059

Keyword

nonn

Author

R. H. Hardin Feb 03 2012

Status

approved