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A266933 Number of nX6 binary arrays with rows lexicographically nondecreasing and columns lexicographically nondecreasing and row sums nondecreasing and column sums nonincreasing. 0

%I #3 Jan 06 2016 11:30:53

%S 2,6,19,82,429,2577,15850,96503,555060,2977370,14782970,68041108,

%T 291292442,1165800099,4383605127,15564591521,52423001756,168200350788,

%U 516045791503,1519124991181

%N Number of nX6 binary arrays with rows lexicographically nondecreasing and columns lexicographically nondecreasing and row sums nondecreasing and column sums nonincreasing.

%C Column 6 of A266935.

%e Some solutions for n=4

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

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

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

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

%Y Cf. A266935.

%K nonn

%O 1,1

%A _R. H. Hardin_, Jan 06 2016

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Last modified April 19 08:45 EDT 2024. Contains 371782 sequences. (Running on oeis4.)