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A203779 Number of (n+1)X(n+1) 0..3 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
90, 10109, 13948153, 215433191774, 36832573887843946, 71462394089059338306691 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Diagonal of A203787

LINKS

Table of n, a(n) for n=1..6.

EXAMPLE

Some solutions for n=4

..1..0..2..1..0....2..3..2..2..2....1..2..0..0..3....3..0..1..0..0

..0..3..1..2..3....3..2..3..3..3....2..1..3..3..2....0..3..2..3..3

..3..1..3..2..1....2..3..3..3..3....2..3..2..2..3....1..2..3..3..3

..3..2..1..2..3....3..3..2..3..3....3..2..3..3..2....3..3..3..0..2

..3..3..3..2..3....3..3..2..3..3....2..3..3..3..2....3..3..3..3..1

CROSSREFS

Sequence in context: A116273 A036257 A276352 * A295594 A200503 A199229

Adjacent sequences:  A203776 A203777 A203778 * A203780 A203781 A203782

KEYWORD

nonn

AUTHOR

R. H. Hardin Jan 05 2012

STATUS

approved

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Last modified July 17 18:47 EDT 2019. Contains 325109 sequences. (Running on oeis4.)