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A267250 Number of 7Xn binary arrays with row sums nondecreasing and columns lexicographically nondecreasing. 0

%I

%S 8,255,5804,129129,2499080,43555569,683027146,9748574556,127531124302,

%T 1540596418525,17291858116440,181338323456395,1785428392643952,

%U 16575758386318547

%N Number of 7Xn binary arrays with row sums nondecreasing and columns lexicographically nondecreasing.

%C Row 7 of A267245.

%e Some solutions for n=4

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

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

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

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

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

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

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

%Y Cf. A267245.

%K nonn

%O 1,1

%A _R. H. Hardin_, Jan 12 2016

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Last modified May 11 11:54 EDT 2021. Contains 343791 sequences. (Running on oeis4.)