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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

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