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

 

Logo


Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A183501 T(n,k)=Half the number of nXk 0..2 arrays with no element equal to the sum mod 3 of its horizontal and vertical neighbors 9
1, 3, 3, 4, 9, 4, 8, 36, 36, 8, 18, 128, 256, 128, 18, 32, 540, 2088, 2088, 540, 32, 64, 2048, 16512, 33057, 16512, 2048, 64, 132, 8256, 131072, 524288, 524288, 131072, 8256, 132, 256, 32784, 1048576, 8388608, 16796160, 8388608, 1048576, 32784, 256, 512, 131328 (list; table; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

Table starts

...1......3.........4...........8...........18............32............64

...3......9........36.........128..........540..........2048..........8256

...4.....36.......256........2088........16512........131072.......1048576

...8....128......2088.......33057.......524288.......8388608.....134226432

..18....540.....16512......524288.....16796160.....536870912...17180393472

..32...2048....131072.....8388608....536870912...34359738368.2199023255552

..64...8256...1048576...134226432..17180393472.2199023255552

.132..32784...8392704..2147483648.549761399856

.256.131328..67113216.34360795152

.512.524288.536870912

LINKS

R. H. Hardin, Table of n, a(n) for n = 1..83

EXAMPLE

Some solutions for 4X3

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

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

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

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

CROSSREFS

Column 6 is half of A183501, powers of 64

Sequence in context: A197431 A197672 A284115 * A086239 A016605 A185395

Adjacent sequences:  A183498 A183499 A183500 * A183502 A183503 A183504

KEYWORD

nonn,tabl

AUTHOR

R. H. Hardin Jan 05 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 | Recent
The OEIS Community | Maintained by The OEIS Foundation Inc.

License Agreements, Terms of Use, Privacy Policy. .

Last modified April 21 10:03 EDT 2019. Contains 322328 sequences. (Running on oeis4.)