A183795 1/4 the number of (n+1)X3 0..3 arrays with no 2X2 subblock having sum 6

706, 31541, 1405874, 62693809, 2795479074, 124651925557, 5558261214722, 247844696877249, 11051471811217570, 492788608567408661, 21973598568887362194, 979809658227406787937, 43690020145898739943394

Offset

1,1

Comments

Column 2 of A183802

Links

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

Formula

Empirical: a(n)=32*a(n-1)+611*a(n-2)-1696*a(n-3)-25173*a(n-4)+95128*a(n-5)+140335*a(n-6)-1227112*a(n-7)+2372316*a(n-8)-1955184*a(n-9)+601344*a(n-10)

Example

Some solutions for 5X3
..0..0..0....0..0..0....0..0..0....0..0..0....0..0..0....0..0..0....0..0..0
..0..0..0....0..0..0....0..0..0....0..0..0....0..0..0....0..0..0....0..0..0
..0..1..1....2..2..3....3..1..2....1..0..1....1..2..3....2..0..2....2..2..1
..0..0..2....1..2..2....2..2..2....3..1..3....3..1..1....3..0..3....3..2..2
..0..3..0....0..1..2....2..3..2....3..0..0....0..3..0....3..1..1....3..2..1

Crossrefs

Sequence in context: A224491 A126830 A005845 * A335092 A252692 A074869

Adjacent sequences: A183792 A183793 A183794 * A183796 A183797 A183798

Keyword

nonn

Author

R. H. Hardin Jan 07 2011

Status

approved