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!)
A206734 T(n,k)=Number of nXk 0..2 arrays avoiding the pattern z-1 z-1 z in any row, column or nw-to-se diagonal 9
3, 9, 9, 25, 81, 25, 69, 625, 625, 69, 190, 4761, 11804, 4761, 190, 523, 36100, 219714, 219714, 36100, 523, 1440, 273529, 4056056, 9974630, 4056056, 273529, 1440, 3965, 2073600, 74880210, 448162001, 448162001, 74880210, 2073600, 3965, 10918 (list; table; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Table starts

....3........9..........25.............69...............190

....9.......81.........625...........4761.............36100

...25......625.......11804.........219714...........4056056

...69.....4761......219714........9974630.........448162001

..190....36100.....4056056......448162001.......48956655199

..523...273529....74880210....20163037412.....5365256703040

.1440..2073600..1384146457...908849973079...589775000656222

.3965.15721225.25593791994.40990717802193.64882388838696223

LINKS

R. H. Hardin, Table of n, a(n) for n = 1..112

EXAMPLE

Some solutions for n=4 k=3

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

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

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

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

CROSSREFS

Sequence in context: A263320 A226717 A207208 * A207358 A207201 A206863

Adjacent sequences:  A206731 A206732 A206733 * A206735 A206736 A206737

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 July 13 05:18 EDT 2020. Contains 335673 sequences. (Running on oeis4.)