A183710 T(n,k) = Number of (n+1) X (k+1) 0..3 arrays with every 2 X 2 subblock nonsingular.

192, 2472, 2472, 31800, 108624, 31800, 409128, 4760784, 4760784, 409128, 5263608, 208772880, 710460576, 208772880, 5263608, 67718760, 9154058448, 106093597920, 106093597920, 9154058448, 67718760, 871232952, 401390133264, 15840740585184

Offset

1,1

Comments

Table starts

...........192................2472.....................31800

..........2472..............108624...................4760784

.........31800.............4760784.................710460576

........409128...........208772880..............106093597920

.......5263608..........9154058448............15840740585184

......67718760........401390133264..........2365244332190880

.....871232952......17600152230096........353161421431958880

...11208812712.....771732813754128......52731638795200916256

..144206530680...33838983410458320....7873523002759947918432

.1855283342568.1483773801471835152.1175620025708806400583456

Links

R. H. Hardin, Table of n, a(n) for n = 1..112

Example

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

Crossrefs

Sequence in context: A362510 A251442 A251435 * A183702 A351632 A174384

Adjacent sequences: A183707 A183708 A183709 * A183711 A183712 A183713

Keyword

nonn,tabl

Author

R. H. Hardin, Jan 06 2011

Status

approved