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!)
A202889 T(n,k)=Number of nXk 0..2 arrays with every nonzero element less than or equal to some horizontal or vertical neighbor 9
1, 3, 3, 9, 35, 9, 22, 265, 265, 22, 51, 1849, 5493, 1849, 51, 121, 13345, 109119, 109119, 13345, 121, 292, 96941, 2223723, 6092872, 2223723, 96941, 292, 704, 701275, 45332961, 348151747, 348151747, 45332961, 701275, 704, 1691, 5071167, 922352267 (list; table; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

Table starts

...1.......3...........9.............22.................51

...3......35.........265...........1849..............13345

...9.....265........5493.........109119............2223723

..22....1849......109119........6092872..........348151747

..51...13345.....2223723......348151747........56006562037

.121...96941....45332961....19914296913......9024909392725

.292..701275...922352267..1137589582096...1452080571954205

.704.5071167.18770352883.64992189188797.233641209300452607

LINKS

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

EXAMPLE

Some solutions for n=3 k=3

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

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

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

CROSSREFS

Sequence in context: A257611 A268617 A264412 * A257620 A032086 A241278

Adjacent sequences:  A202886 A202887 A202888 * A202890 A202891 A202892

KEYWORD

nonn,tabl

AUTHOR

R. H. Hardin Dec 25 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 7 19:49 EDT 2020. Contains 333306 sequences. (Running on oeis4.)