A184490 Number of (n+1)X3 0..2 arrays with every 2X2 subblock sum greater than 4

165, 1983, 20514, 225739, 2429833, 26384550, 285552669, 3094453927, 33517063586, 363104617411, 3933373186569, 42609958428230, 461585542594517, 5000289770972767, 54167328433304858, 586786270194480467

Offset

1,1

Comments

Column 2 of A184497

Links

R. H. Hardin, Table of n, a(n) for n = 1..200

Formula

Empirical: a(n)=8*a(n-1)+42*a(n-2)-106*a(n-3)-213*a(n-4)+351*a(n-5)+186*a(n-6)-256*a(n-7)-40*a(n-8)+48*a(n-9)

Example

Some solutions for 5X3
..0..2..0....0..2..1....0..2..2....0..2..1....0..2..2....0..2..2....0..2..1
..2..2..1....2..2..1....1..2..0....1..2..2....2..2..2....2..1..1....2..1..2
..2..1..2....2..2..1....1..2..2....0..2..2....0..1..2....2..2..2....0..2..1
..1..2..0....2..2..2....1..2..2....2..2..2....2..2..2....2..1..1....1..2..1
..1..2..2....2..1..0....2..2..1....0..2..0....0..1..1....2..2..1....2..2..0

Crossrefs

Sequence in context: A241614 A225715 A066177 * A027796 A145055 A194483

Adjacent sequences: A184487 A184488 A184489 * A184491 A184492 A184493

Keyword

nonn

Author

R. H. Hardin Jan 15 2011

Status

approved