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!)
A222430 T(n,k)=Number of nXk 0..2 arrays with exactly floor(nXk/2) elements unequal to at least one horizontal or vertical neighbor, with new values introduced in row major 0..2 order 6
1, 0, 0, 0, 0, 0, 3, 4, 4, 3, 4, 13, 4, 13, 4, 8, 36, 75, 75, 36, 8, 10, 132, 298, 766, 298, 132, 10, 50, 584, 3256, 7929, 7929, 3256, 584, 50, 66, 2054, 12442, 88455, 77053, 88455, 12442, 2054, 66, 216, 7700, 142378, 1009168, 2601092, 2601092, 1009168, 142378 (list; table; graph; refs; listen; history; text; internal format)
OFFSET
1,7
COMMENTS
Table starts
....1......0.........0...........3............4.............8............10
....0......0.........4..........13...........36...........132...........584
....0......4.........4..........75..........298..........3256.........12442
....3.....13........75.........766.........7929.........88455.......1009168
....4.....36.......298........7929........77053.......2601092......28654054
....8....132......3256.......88455......2601092......82680222....2808238414
...10....584.....12442.....1009168.....28654054....2808238414...91216434813
...50...2054....142378....11742060...1031825766...98100073298.9844752528713
...66...7700....538894...136046418..11887826140.3504105045604
..216..29208...6301728..1597242853.435680320590
..280.113024..23842008.18702751927
.1120.428784.282114008
LINKS
EXAMPLE
Some solutions for n=4 k=4
..0..0..1..1....0..0..0..0....0..0..1..1....0..0..0..0....0..0..0..0
..0..0..2..2....1..0..0..0....0..0..0..1....0..0..0..0....0..0..0..0
..0..0..0..0....0..0..0..0....0..0..0..2....0..0..1..1....0..0..1..0
..0..0..0..0....0..0..1..0....0..0..0..2....0..2..1..1....0..1..2..2
CROSSREFS
Column 1 is A222395
Sequence in context: A295570 A035004 A222290 * A222275 A355017 A000916
KEYWORD
nonn,tabl
AUTHOR
R. H. Hardin Feb 19 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 April 16 07:08 EDT 2024. Contains 371698 sequences. (Running on oeis4.)