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!)
A199647 T(n,k)=Number of nXk 0..2 arrays with values 0..2 introduced in row major order and each element equal to one or two horizontal and vertical neighbors 8
0, 1, 1, 1, 3, 1, 2, 13, 13, 2, 3, 60, 112, 60, 3, 6, 288, 1265, 1265, 288, 6, 11, 1384, 12748, 29229, 12748, 1384, 11, 22, 6628, 134748, 658770, 658770, 134748, 6628, 22, 43, 31772, 1396083, 15066222, 32177372, 15066222, 1396083, 31772, 43, 86, 152304 (list; table; graph; refs; listen; history; text; internal format)
OFFSET
1,5
COMMENTS
Table starts
..0......1..........1.............2................3..................6
..1......3.........13............60..............288...............1384
..1.....13........112..........1265............12748.............134748
..2.....60.......1265.........29229...........658770...........15066222
..3....288......12748........658770.........32177372.........1614250077
..6...1384.....134748......15066222.......1614250077.......176701683386
.11...6628....1396083.....342328663......80053957248.....19161971644783
.22..31772...14584050....7797114144....3988024796446...2085499380111100
.43.152304..151837464..177447181083..198328767139736.226676302441401393
.86.730036.1582988477.4039488090307.9869645990489747
LINKS
EXAMPLE
Some solutions for n=5 k=3
..0..0..0....0..1..1....0..0..1....0..0..1....0..1..1....0..1..1....0..0..0
..1..1..0....0..2..2....2..2..1....0..1..1....0..0..1....0..2..2....1..2..2
..0..0..2....1..0..2....0..0..2....1..2..2....2..1..1....0..0..2....1..2..0
..0..1..2....1..0..0....1..1..2....1..2..1....2..2..0....2..1..1....1..1..0
..0..1..1....2..2..2....2..2..2....2..2..1....0..0..0....2..1..1....2..2..0
CROSSREFS
Column 1 is A005578(n-2)
Sequence in context: A254630 A145463 A144107 * A199149 A198669 A171059
KEYWORD
nonn,tabl
AUTHOR
R. H. Hardin Nov 08 2011
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 March 28 18:04 EDT 2024. Contains 371254 sequences. (Running on oeis4.)