A184564 T(n,k)=Number of (n+1)X(k+1) 0..2 arrays with no 2X2 subblock summing to less than 4.

50, 336, 336, 2167, 5736, 2167, 14180, 91157, 91157, 14180, 92429, 1486258, 3436266, 1486258, 92429, 603249, 24057629, 134840527, 134840527, 24057629, 603249, 3935721, 390354307, 5228522011, 12900566348, 5228522011, 390354307, 3935721

Offset

1,1

Comments

Table starts

.........50............336...............2167..................14180

........336...........5736..............91157................1486258

.......2167..........91157............3436266..............134840527

......14180........1486258..........134840527............12900566348

......92429.......24057629.........5228522011..........1214657950233

.....603249......390354307.......203570564774........115000791536877

....3935721.....6329171799......7915660174974......10868641315040295

...25680486...102644935902....307926979784837....1027803541995894568

..167558680..1664547601646..11976979258313503...97176104485641628222

.1093290051.26993866274311.465872448754593695.9188347231740579769607

Links

R. H. Hardin, Table of n, a(n) for n = 1..180

Example

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

Crossrefs

Sequence in context: A221572 A124809 A261803 * A184556 A373131 A334697

Adjacent sequences: A184561 A184562 A184563 * A184565 A184566 A184567

Keyword

nonn,tabl

Author

R. H. Hardin, Jan 17 2011

Status

approved