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!)
A204331 Number of (n+1)X(n+1) 0..7 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 0
1212, 947240, 1641649698, 4891607353910, 20044731040262804 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Diagonal of A204339

LINKS

Table of n, a(n) for n=1..5.

EXAMPLE

Some solutions for n=4

..0..0..4..0..2....2..7..2..7..5....5..4..6..3..5....4..3..1..1..6

..1..3..1..5..7....7..2..7..5..7....3..6..4..7..5....2..5..7..7..7

..6..4..6..5..7....2..7..5..7..6....5..4..6..5..7....0..7..7..7..7

..3..7..5..6..6....4..5..7..6..7....2..7..5..6..6....7..7..7..7..7

..5..5..7..6..6....2..7..6..7..6....7..5..7..6..6....7..7..7..7..7

CROSSREFS

Sequence in context: A203657 A250159 A184464 * A105311 A252125 A251815

Adjacent sequences:  A204328 A204329 A204330 * A204332 A204333 A204334

KEYWORD

nonn

AUTHOR

R. H. Hardin Jan 14 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 | Recent
The OEIS Community | Maintained by The OEIS Foundation Inc.

License Agreements, Terms of Use, Privacy Policy. .

Last modified November 28 10:05 EST 2021. Contains 349401 sequences. (Running on oeis4.)