A183698 T(n,k)=Number of (n+1)X(k+1) 0..2 arrays with every 2X2 subblock nonsingular.

50, 314, 314, 1970, 4594, 1970, 12362, 66658, 66658, 12362, 77570, 969978, 2235330, 969978, 77570, 486746, 14100346, 75166498, 75166498, 14100346, 486746, 3054290, 205047906, 2525447442, 5848268518, 2525447442, 205047906, 3054290, 19165418

Offset

1,1

Comments

Table starts

........50...........314...............1970..................12362

.......314..........4594..............66658.................969978

......1970.........66658............2235330...............75166498

.....12362........969978...........75166498.............5848268518

.....77570......14100346.........2525447442...........454422625582

....486746.....205047906........84872526674.........35325040673626

...3054290....2981428242......2852069116186.......2745624826054514

..19165418...43352455562.....95843840904146.....213413389362873662

.120261410..630370287594...3220808030907306...16588019956268604926

.754630394.9166011482354.108234716039535994.1289347795300644331026

Links

R. H. Hardin, Table of n, a(n) for n = 1..179

Example

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

Crossrefs

Sequence in context: A046656 A382145 A205620 * A183690 A221572 A124809

Adjacent sequences: A183695 A183696 A183697 * A183699 A183700 A183701

Keyword

nonn,tabl

Author

R. H. Hardin, Jan 06 2011

Status

approved