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!)
A203445 Number of (n+1)X(n+1) 0..1 arrays with column and row pair sums b(i,j)=a(i,j)+a(i,j-1) and c(i,j)=a(i,j)+a(i-1,j) such that rows of b(i,j) and columns of c(i,j) are lexicographically nondecreasing 0
8, 34, 321, 7481, 554620, 125140148, 91479447926, 216607480473481, 1675743278510590472, 42706348945332757503203 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,1
COMMENTS
Diagonal of A203452
LINKS
EXAMPLE
Some solutions for n=4
..0..0..0..1..1....0..0..0..1..1....0..0..1..1..1....0..0..0..0..0
..0..0..1..1..1....0..0..0..1..1....0..0..1..1..1....0..0..0..1..1
..0..1..0..0..0....0..0..1..0..1....0..1..0..1..1....0..1..1..1..1
..1..0..1..1..1....0..1..0..1..1....0..1..1..1..1....1..1..1..0..0
..0..1..1..1..1....1..1..1..0..0....1..1..0..0..1....1..1..1..0..1
CROSSREFS
Sequence in context: A229398 A223015 A222796 * A318244 A280395 A158991
KEYWORD
nonn
AUTHOR
R. H. Hardin Jan 02 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 | Recents
The OEIS Community | Maintained by The OEIS Foundation Inc.

License Agreements, Terms of Use, Privacy Policy. .

Last modified March 28 20:05 EDT 2024. Contains 371254 sequences. (Running on oeis4.)