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A183710 T(n,k) = Number of (n+1) X (k+1) 0..3 arrays with every 2 X 2 subblock nonsingular. 10
192, 2472, 2472, 31800, 108624, 31800, 409128, 4760784, 4760784, 409128, 5263608, 208772880, 710460576, 208772880, 5263608, 67718760, 9154058448, 106093597920, 106093597920, 9154058448, 67718760, 871232952, 401390133264, 15840740585184 (list; table; graph; refs; listen; history; text; internal format)
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: A188786 A251442 A251435 * A183702 A174384 A232919

Adjacent sequences:  A183707 A183708 A183709 * A183711 A183712 A183713

KEYWORD

nonn,tabl

AUTHOR

R. H. Hardin, Jan 06 2011

STATUS

approved

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Last modified November 27 07:28 EST 2021. Contains 349365 sequences. (Running on oeis4.)