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

 Year-end appeal: Please make a donation to the OEIS Foundation to support ongoing development and maintenance of the OEIS. We are now in our 59th year, we have over 358,000 sequences, and we’ve crossed 10,300 citations (which often say “discovered thanks to the OEIS”). Other ways to Give
 Hints (Greetings from The On-Line Encyclopedia of Integer Sequences!)
 A203720 Number of (n+1)X(n+1) 0..2 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) nondecreasing in column and row directions, respectively 1
 32, 480, 6249, 72777, 808455, 9149941, 108633030, 1362582726, 17889577522, 242706969233, 3365618287527, 47365931280277, 673677478328651, 9659756420132067, 139434264644779578, 2024155694575590620 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS Diagonal of A203728 LINKS R. H. Hardin, Table of n, a(n) for n = 1..22 EXAMPLE Some solutions for n=4 ..0..1..1..1..0....0..1..0..2..2....1..0..1..0..1....1..2..1..1..1 ..2..1..1..1..2....1..1..2..2..2....1..2..1..2..1....2..1..2..2..2 ..1..2..2..2..2....2..2..2..2..2....2..1..2..1..2....1..2..2..2..2 ..1..2..2..2..2....2..2..2..2..2....1..2..1..2..2....1..2..2..2..2 ..2..2..2..2..2....2..2..2..2..2....2..1..2..2..2....1..2..2..2..2 CROSSREFS Sequence in context: A319307 A022069 A250560 * A306411 A085539 A091364 Adjacent sequences: A203717 A203718 A203719 * A203721 A203722 A203723 KEYWORD nonn AUTHOR R. H. Hardin Jan 05 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.

Last modified November 29 02:51 EST 2022. Contains 358421 sequences. (Running on oeis4.)