login
The OEIS is supported by the many generous donors to the OEIS Foundation.

 

Logo
Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A223885 T(n,k)=Number of nXk 0..2 arrays with row sums unimodal and column sums inverted unimodal 4
3, 9, 9, 22, 81, 22, 46, 564, 564, 46, 86, 3298, 11250, 3298, 86, 148, 17048, 187019, 187019, 17048, 148, 239, 80412, 2718572, 8872648, 2718572, 80412, 239, 367, 353485, 35673854, 367614623, 367614623, 35673854, 353485, 367, 541, 1469903, 431939504 (list; table; graph; refs; listen; history; text; internal format)
OFFSET
1,1
COMMENTS
Table starts
...3.......9.........22...........46............86...........148
...9......81........564.........3298.........17048.........80412
..22.....564......11250.......187019.......2718572......35673854
..46....3298.....187019......8872648.....367614623...13705619321
..86...17048....2718572....367614623...43524907508.4637374623582
.148...80412...35673854..13705619321.4637374623582
.239..353485..431939504.469700382368
.367.1469903.4901224903
.541.5845411
.771
LINKS
EXAMPLE
Some solutions for n=3 k=4
..1..0..1..2....0..1..0..2....1..1..0..1....1..1..0..0....1..0..2..1
..2..1..1..1....2..2..1..1....1..1..1..0....2..2..1..1....0..2..1..1
..2..0..0..2....2..0..2..1....0..0..1..0....1..1..2..2....2..2..1..2
CROSSREFS
Column 1 is A223718
Sequence in context: A223742 A223725 A223831 * A223892 A223789 A223975
KEYWORD
nonn,tabl
AUTHOR
R. H. Hardin Mar 28 2013
STATUS
approved

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

License Agreements, Terms of Use, Privacy Policy. .

Last modified April 23 03:30 EDT 2024. Contains 371906 sequences. (Running on oeis4.)