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A181009 T(n,k)=number of nXk binary matrices with rows and columns each in strictly increasing order as binary numbers and the number of 1s in rows being even and in columns being odd 1
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 2, 0, 0, 0, 0, 0, 0, 0, 2, 0, 0, 0, 0, 0, 0, 0, 0, 2, 0, 0, 0, 0, 0, 0, 0, 62, 0, 1, 0, 0, 0, 0, 0, 0, 1, 0, 600, 0, 0, 0, 0, 0, 0, 0, 0, 0, 199, 0, 3733, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 16358, 0, 16766, 0, 0, 0, 0, 0, 0, 0, 0, 0, 168, 0 (list; table; graph; refs; listen; history; text; internal format)
OFFSET
1,25
COMMENTS
Table starts
.0.0.0.0.0......0.0..........0.0..............0.0............0.0...........0.0
.0.0.0.0.0......0.0..........0.0..............0.0............0.0...........0.0
.0.0.0.1.0......0.0..........0.0..............0.0............0.0...........0.0
.0.0.0.2.0......0.0..........1.0..............0.0............0.0...........0.0
.0.0.0.2.0.....62.0........199.0............168.0...........77.0...........0.0
.0.0.0.2.0....600.0......16358.0.........173145.0.......914322.0.....2666391.0
.0.0.0.1.0...3733.0.....653236.0.......41701318.0...1424323084.0.29927830680..
.0.0.0.0.0..16766.0...16940275.0.....5556267319.0.969187520899.0..............
.0.0.0.0.0..59570.0..338483569.0...527470107599.0.............................
.0.0.0.0.0.175299.0.5562102737.0.39865133669986...............................
LINKS
EXAMPLE
All solutions for 4X4
..0..0..0..0....0..0..1..1
..0..0..1..1....0..1..0..1
..0..1..0..1....0..1..1..0
..1..0..0..1....1..1..1..1
CROSSREFS
Sequence in context: A332014 A331984 A087781 * A270599 A091398 A062103
KEYWORD
nonn,tabl
AUTHOR
R. H. Hardin Sep 30 2010
STATUS
approved

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Last modified March 29 08:59 EDT 2024. Contains 371268 sequences. (Running on oeis4.)