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A180984 T(n,k)=number of nXk binary matrices with rows and columns in lexicographically strictly increasing order 1
2, 1, 1, 0, 3, 0, 0, 3, 3, 0, 0, 1, 15, 1, 0, 0, 0, 31, 31, 0, 0, 0, 0, 34, 234, 34, 0, 0, 0, 0, 21, 925, 925, 21, 0, 0, 0, 0, 7, 2366, 10706, 2366, 7, 0, 0, 0, 0, 1, 4305, 77079, 77079, 4305, 1, 0, 0, 0, 0, 0, 5845, 400672, 1411450, 400672, 5845, 0, 0, 0, 0, 0, 0, 6059, 1621242 (list; table; graph; refs; listen; history; text; internal format)
OFFSET
1,1
COMMENTS
Table starts
.2.1..0....0........0..........0.............0...............0
.1.3..3....1........0..........0.............0...............0
.0.3.15...31.......34.........21.............7...............1
.0.1.31..234......925.......2366..........4305............5845
.0.0.34..925....10706......77079........400672.........1621242
.0.0.21.2366....77079....1411450......18068175.......179023089
.0.0..7.4305...400672...18068175.....539124281.....12176364503
.0.0..1.5845..1621242..179023089...12176364503....607445721710
.0.0..0.6059..5329869.1451615923..223274567811..24245093840300
.0.0..0.4830.14617117.9963573356.3463014573021.813139746187214
LINKS
EXAMPLE
All solutions for 3X3
..0..0..0....0..0..0....0..0..0....0..0..1....0..0..1....0..0..1....0..0..1
..0..0..1....0..0..1....0..1..1....0..1..0....0..1..0....0..1..0....0..1..0
..0..1..0....0..1..1....1..0..1....0..1..1....1..0..0....1..1..0....1..0..1
...
..0..0..1....0..0..1....0..0..1....0..0..1....0..0..1....0..1..1....0..1..1
..0..1..0....0..1..1....0..1..1....0..1..1....0..1..1....1..0..0....1..0..1
..1..1..1....1..0..0....1..1..0....1..0..1....1..1..1....1..0..1....1..1..0
...
..0..1..1
..1..0..1
..1..1..1
CROSSREFS
Sequence in context: A253587 A110962 A065715 * A051628 A163540 A127967
KEYWORD
nonn,tabl
AUTHOR
R. H. Hardin Sep 30 2010
STATUS
approved

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Last modified March 29 11:14 EDT 2024. Contains 371278 sequences. (Running on oeis4.)