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 A204643 Number of (n+1)X(n+1) 0..1 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
 8, 32, 104, 330, 1076, 3702, 13314, 49312, 185786, 706912, 2706218, 10403402, 40120324, 155122378, 601086622, 2333614100, 9075145134, 35345275932, 137846543630, 538257892350, 2104098985192, 8233430753142, 32247603713264 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS Diagonal of A204651 LINKS R. H. Hardin, Table of n, a(n) for n = 1..63 EXAMPLE Some solutions for n=5 ..0..0..0..0..0..1....0..0..0..0..1..1....0..0..0..0..0..1....0..0..0..0..0..0 ..0..0..1..1..1..1....0..0..0..0..1..1....0..0..0..0..1..1....0..0..0..0..0..0 ..0..0..1..1..1..1....0..0..0..1..1..1....0..0..0..0..1..1....0..0..0..0..1..1 ..0..1..1..1..1..1....0..0..1..1..1..1....0..0..0..0..1..1....0..0..0..0..1..1 ..1..1..1..1..1..1....0..1..1..1..1..1....0..0..0..1..1..1....0..1..1..1..1..1 ..1..1..1..1..1..1....1..1..1..1..1..1....1..1..1..1..1..1....1..1..1..1..1..1 CROSSREFS Sequence in context: A357285 A100312 A302507 * A036393 A003201 A318944 Adjacent sequences: A204640 A204641 A204642 * A204644 A204645 A204646 KEYWORD nonn AUTHOR R. H. Hardin Jan 17 2012 STATUS approved

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Last modified June 17 03:01 EDT 2024. Contains 373432 sequences. (Running on oeis4.)