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!)
A206974 T(n,k)=Number of nXk 0..3 arrays avoiding the pattern z-1 z-1 z in any row, column, nw-to-se diagonal or ne-to-sw antidiagonal 12
4, 16, 16, 61, 256, 61, 232, 3721, 3721, 232, 882, 53824, 180294, 53824, 882, 3353, 777924, 8685113, 8688551, 777924, 3353, 12747, 11242609, 419203246, 1391081032, 417476451, 11242609, 12747, 48460, 162486009, 20232472915, 223912418544 (list; table; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Table starts

.....4.........16.............61..............232...............882

....16........256...........3721............53824............777924

....61.......3721.........180294..........8685113.........419203246

...232......53824........8688551.......1391081032......223912418544

...882.....777924......417476451.....221715091199...118749552817647

..3353...11242609....20061347530...35350565625684.63023113538493420

.12747..162486009...964232197214.5637076828393230

.48460.2348371600.46342878010975

LINKS

R. H. Hardin, Table of n, a(n) for n = 1..60

EXAMPLE

Some solutions for n=4 k=3

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

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

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

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

CROSSREFS

Column 1 and row 1 are A206570

Column 2 and row 2 are A206571

Sequence in context: A269201 A269289 A267933 * A206577 A207582 A207057

Adjacent sequences:  A206971 A206972 A206973 * A206975 A206976 A206977

KEYWORD

nonn,tabl

AUTHOR

R. H. Hardin Feb 14 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 September 27 20:35 EDT 2020. Contains 337388 sequences. (Running on oeis4.)