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A203957 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) such that rows of b(i,j) and columns of c(i,j) are lexicographically nondecreasing 0
32, 851, 144184, 157316750, 1111763853732, 50733485047025530, 15590622229636053238362 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Diagonal of A203965

LINKS

Table of n, a(n) for n=1..7.

EXAMPLE

Some solutions for n=4

..0..0..2..0..1....1..1..2..2..1....0..1..0..2..2....1..2..1..1..1

..1..1..0..2..1....1..2..1..1..2....1..1..2..2..2....2..1..2..2..2

..0..2..0..1..2....2..1..2..2..2....2..1..1..2..2....1..2..2..2..2

..1..1..2..1..2....2..2..2..2..0....1..2..1..2..2....1..2..2..2..2

..2..2..1..2..2....2..2..2..2..0....1..2..2..0..2....1..2..2..2..2

CROSSREFS

Sequence in context: A139677 A231161 A220460 * A301839 A302067 A281474

Adjacent sequences:  A203954 A203955 A203956 * A203958 A203959 A203960

KEYWORD

nonn

AUTHOR

R. H. Hardin Jan 08 2012

STATUS

approved

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Last modified August 4 07:32 EDT 2020. Contains 336201 sequences. (Running on oeis4.)