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Number of 5X5 0..n arrays with rows in lexicographically nondecreasing order and columns in nonincreasing order
1

%I #4 Sep 29 2013 06:46:42

%S 252,2179956,3062815568,843211336888,81937334158292,3896490956821414,

%T 110102810429666544,2093314279759590565,29136130649614970102,

%U 315228320642171324718,2770642691605055402356,20456013945849864263232

%N Number of 5X5 0..n arrays with rows in lexicographically nondecreasing order and columns in nonincreasing order

%C Row 5 of A229774

%H R. H. Hardin, <a href="/A229777/b229777.txt">Table of n, a(n) for n = 1..17</a>

%e Some solutions for n=1

%e ..1..0..0..0..0....0..0..0..0..0....1..1..0..0..0....0..0..0..0..0

%e ..1..0..0..0..0....1..1..0..0..0....1..1..0..0..0....0..0..0..0..0

%e ..1..0..0..0..0....1..1..1..0..0....1..1..0..0..0....1..1..1..0..0

%e ..1..1..0..0..0....1..1..1..0..0....1..1..0..0..0....1..1..1..0..0

%e ..1..1..1..1..0....1..1..1..1..0....1..1..1..1..0....1..1..1..1..0

%K nonn

%O 1,1

%A _R. H. Hardin_, Sep 29 2013