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A267249
Number of 6Xn binary arrays with row sums nondecreasing and columns lexicographically nondecreasing.
0
7, 127, 1685, 20676, 220235, 2093467, 17892539, 139164323, 993947185, 6572368601, 40512935649, 234192144667, 1276154088792, 6584891361478, 32302298031855, 151176059240006
OFFSET
1,1
COMMENTS
Row 6 of A267245.
EXAMPLE
Some solutions for n=4
..0..0..0..1....0..0..0..1....0..0..1..1....0..0..0..1....0..0..0..1
..0..0..1..0....1..1..1..0....1..1..0..0....0..0..1..1....0..0..1..0
..0..1..0..0....1..1..1..0....1..1..0..0....0..1..1..0....0..1..1..0
..1..1..0..0....0..1..1..1....0..1..0..1....1..1..1..0....1..1..0..0
..0..1..1..0....1..0..1..1....1..1..0..0....1..1..0..1....0..1..1..1
..1..1..0..0....0..1..1..1....0..1..1..0....1..1..1..1....1..1..1..1
CROSSREFS
Cf. A267245.
Sequence in context: A255954 A278791 A064754 * A025166 A241955 A139291
KEYWORD
nonn
AUTHOR
R. H. Hardin, Jan 12 2016
STATUS
approved