A183802 T(n,k)=1/4 the number of (n+1)X(k+1) 0..3 arrays with no 2X2 subblock having sum 6

53, 706, 706, 9395, 31541, 9395, 125050, 1405874, 1405874, 125050, 1664363, 62693809, 209636605, 62693809, 1664363, 22152262, 2795479074, 31282399226, 31282399226, 2795479074, 22152262, 294840155, 124651925557, 4667280876143

Offset

1,1

Comments

Table starts

.........53.............706.................9395...................125050

........706...........31541..............1405874.................62693809

.......9395.........1405874............209636605..............31282399226

.....125050........62693809..........31282399226...........15624102535570

....1664363......2795479074........4667280876143.........7801858146547239

...22152262....124651925557......696376467061670......3896032216049375462

..294840155...5558261214722...103901117941072621...1945547111978093787994

.3924240130.247844696877249.15502344363749910194.971543622805762575749749

Links

Table of n, a(n) for n=1..24.

Example

Some solutions for 4X3
..0..2..2....0..0..0....0..0..2....0..2..0....0..0..2....0..2..0....0..0..2
..2..0..1....0..0..3....0..2..3....0..2..3....2..0..1....0..2..0....2..0..0
..1..0..3....0..1..1....3..3..0....0..1..2....1..0..1....0..3..0....1..1..2
..2..2..0....2..0..1....2..2..0....3..0..2....3..0..1....3..2..0....0..3..2

Crossrefs

Sequence in context: A027007 A142780 A289808 * A183794 A201153 A077794

Adjacent sequences: A183799 A183800 A183801 * A183803 A183804 A183805

Keyword

nonn,tabl

Author

R. H. Hardin Jan 07 2011

Status

approved