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!)
A223658 Number of n X n 0..3 arrays with row sums unimodal and column sums inverted unimodal 0

%I

%S 4,256,141046,761845474,44626165058452

%N Number of n X n 0..3 arrays with row sums unimodal and column sums inverted unimodal

%C Diagonal of A223663

%e Some solutions for n=3

%e ..1..0..2....0..0..1....0..0..1....0..1..0....3..0..2....2..1..3....2..0..2

%e ..3..2..3....2..0..1....2..0..3....3..3..2....1..2..2....3..2..1....0..2..2

%e ..0..1..2....2..1..2....0..2..2....3..1..1....2..2..0....0..2..2....3..1..3

%K nonn

%O 1,1

%A _R. H. Hardin_ Mar 25 2013

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 May 28 09:09 EDT 2022. Contains 354112 sequences. (Running on oeis4.)