A184153 T(n,k)=1/4 the number of (n+1)X(k+1) 0..3 arrays with every 2X2 subblock having at least two equal elements connected horizontally or vertically

43, 499, 499, 5695, 17203, 5695, 65227, 584143, 584143, 65227, 746503, 19882711, 58656073, 19882711, 746503, 8544883, 676507975, 5910714349, 5910714349, 676507975, 8544883, 97806031, 23019453235, 595270788529, 1764076701091

Offset

1,1

Comments

Table starts

.........43............499...............5695...................65227

........499..........17203.............584143................19882711

.......5695.........584143...........58656073..............5910714349

......65227.......19882711.........5910714349...........1764076701091

.....746503......676507975.......595270788529.........526180845527509

....8544883....23019453235.....59956202692285......156962462690881921

...97806031...783273204631...6038729388705523....46821946289531019895

.1119511003.26652142523719.608216983453837129.13967039613166010435737

Links

R. H. Hardin, Table of n, a(n) for n = 1..84

Example

Some solutions for 4X3 with a(1,1)=0
..0..0..0....0..0..0....0..0..0....0..0..0....0..0..2....0..0..0....0..0..2
..0..0..1....1..3..0....0..0..0....0..2..1....1..2..2....3..2..1....2..1..1
..2..2..2....2..3..0....2..2..0....0..2..2....1..0..0....0..0..0....2..2..0
..2..2..0....0..3..3....2..3..3....0..3..1....1..2..1....1..3..2....3..3..3

Crossrefs

Sequence in context: A140849 A188133 A194784 * A184145 A238202 A008388

Adjacent sequences: A184150 A184151 A184152 * A184154 A184155 A184156

Keyword

nonn,tabl

Author

R. H. Hardin Jan 09 2011

Status

approved