login
This site is supported by donations to The OEIS Foundation.

 

Logo

Invitation: celebrating 50 years of OEIS, 250000 sequences, and Sloane's 75th, there will be a conference at DIMACS, Rutgers, Oct 9-10 2014.

Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
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 10
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 (list; table; graph; refs; listen; history; text; internal format)
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

Lookup | Welcome | Wiki | Register | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Transforms | Superseeker | Recent | More pages
The OEIS Community | Maintained by The OEIS Foundation Inc.

Content is available under The OEIS End-User License Agreement .

Last modified October 2 02:22 EDT 2014. Contains 247527 sequences.