login
The OEIS Foundation is supported by donations from users of the OEIS and by a grant from the Simons Foundation.

 

Logo


Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A206692 T(n,k)=Number of nXk 0..3 arrays with no element equal to another within two positions in the same row or column, and new values 0..3 introduced in row major order 7
1, 1, 1, 1, 4, 1, 2, 11, 11, 2, 4, 36, 44, 36, 4, 8, 116, 176, 176, 116, 8, 16, 376, 704, 916, 704, 376, 16, 32, 1216, 2816, 4704, 4704, 2816, 1216, 32, 64, 3936, 11264, 24492, 31504, 24492, 11264, 3936, 64, 128, 12736, 45056, 127008, 213788, 213788, 127008 (list; table; graph; refs; listen; history; text; internal format)
OFFSET

1,5

COMMENTS

Table starts

..1....1.....1......2.......4.........8.........16..........32...........64

..1....4....11.....36.....116.......376.......1216........3936........12736

..1...11....44....176.....704......2816......11264.......45056.......180224

..2...36...176....916....4704.....24492.....127008......660888......3436488

..4..116...704...4704...31504....213788....1454810.....9933294.....67923354

..8..376..2816..24492..213788...1915580...17277556...156946368...1429962032

.16.1216.11264.127008.1454810..17277556..208563912..2543024548..31198656992

.32.3936.45056.660888.9933294.156946368.2543024548.41832855136.694325337444

LINKS

R. H. Hardin, Table of n, a(n) for n = 1..199

EXAMPLE

Some solutions for n=4 k=3

..0..1..2....0..1..2....0..1..2....0..1..2....0..1..2....0..1..2....0..1..2

..2..3..0....3..0..1....1..2..3....1..2..3....3..2..1....1..2..3....1..3..0

..1..2..3....1..2..3....2..0..1....2..3..1....2..0..3....2..3..0....2..0..1

..3..0..1....0..3..2....3..1..2....0..1..2....0..1..2....0..1..2....3..1..2

CROSSREFS

Column 3 is A002089(n-2)

Sequence in context: A152253 A280440 A024569 * A159756 A110559 A030441

Adjacent sequences:  A206689 A206690 A206691 * A206693 A206694 A206695

KEYWORD

nonn,tabl

AUTHOR

R. H. Hardin Feb 11 2012

STATUS

approved

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

License Agreements, Terms of Use, Privacy Policy. .

Last modified August 4 13:53 EDT 2021. Contains 346447 sequences. (Running on oeis4.)