login
The OEIS is supported by the many generous donors to the OEIS Foundation.

 

Logo
Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A222769 T(n,k)=Number of nXk 0..1 arrays with exactly floor(nXk/2) elements unequal to at least one horizontal or antidiagonal neighbor, with new values introduced in row major 0..1 order 14
1, 0, 0, 0, 3, 0, 3, 4, 4, 0, 4, 11, 13, 20, 0, 4, 18, 66, 96, 48, 0, 5, 73, 158, 465, 301, 175, 0, 20, 152, 934, 2608, 3431, 2242, 512, 0, 27, 470, 2446, 15077, 19766, 25772, 7575, 1719, 0, 48, 1022, 14567, 89811, 256546, 333978, 196185, 55958, 5400, 0, 63, 3361, 39972 (list; table; graph; refs; listen; history; text; internal format)
OFFSET

1,5

COMMENTS

Table starts

.1......0........0..........3............4...............4.................5

.0......3........4.........11...........18..............73...............152

.0......4.......13.........66..........158.............934..............2446

.0.....20.......96........465.........2608...........15077.............89811

.0.....48......301.......3431........19766..........256546...........1570588

.0....175.....2242......25772.......333978.........4479721..........62017670

.0....512.....7575.....196185......2645385........79612578........1139211468

.0...1719....55958....1508369.....45830457......1432512703.......46316300783

.0...5400...196442...11685222....370518626.....26011740182......872037778022

.0..17776..1448568...91068653...6504289924....475591230143....36016907441620

.0..57420..5188656..713197411..53224723750...8742929996332...687733392122744

.0.188656.38338122.5607868082.942396671062.161434491485598.28680675666813436

LINKS

R. H. Hardin, Table of n, a(n) for n = 1..239

EXAMPLE

Some solutions for n=3 k=4

..0..1..1..1....0..0..1..1....0..0..0..0....0..0..0..1....0..0..0..0

..1..1..1..0....0..0..1..0....1..1..0..0....0..0..0..1....0..0..0..0

..1..1..1..0....0..0..0..0....0..0..0..0....0..1..1..1....1..1..1..1

CROSSREFS

Row 1 is A222283

Sequence in context: A127753 A197736 A073367 * A111862 A277092 A060858

Adjacent sequences:  A222766 A222767 A222768 * A222770 A222771 A222772

KEYWORD

nonn,tabl

AUTHOR

R. H. Hardin Mar 05 2013

STATUS

approved

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

License Agreements, Terms of Use, Privacy Policy. .

Last modified May 25 18:25 EDT 2022. Contains 354071 sequences. (Running on oeis4.)