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 A203888 Number of (n+1)X(n+1) 0..4 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
 205, 72423, 499486878, 58500223468696, 116191919935256968675 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS Diagonal of A203896 LINKS Table of n, a(n) for n=1..5. EXAMPLE Some solutions for n=4 ..0..2..3..1..3....1..0..4..1..3....1..0..3..4..0....1..4..4..3..3 ..4..3..2..4..3....3..4..1..4..2....0..2..0..0..4....3..3..3..4..4 ..4..3..4..4..0....3..4..3..0..2....3..1..4..3..2....4..2..4..4..4 ..4..3..4..4..1....4..4..0..3..2....0..4..2..2..2....2..4..3..3..3 ..3..4..4..3..1....4..4..2..0..3....3..2..3..1..4....4..3..4..1..1 CROSSREFS Sequence in context: A203862 A289333 A015289 * A188447 A252278 A252271 Adjacent sequences: A203885 A203886 A203887 * A203889 A203890 A203891 KEYWORD nonn AUTHOR R. H. Hardin Jan 07 2012 STATUS approved

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Last modified April 12 20:17 EDT 2024. Contains 371636 sequences. (Running on oeis4.)