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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 * A359842 A295594 A200503 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 May 25 04:52 EDT 2024. Contains 372782 sequences. (Running on oeis4.)