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A186068
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T(n,k) = Number of (n+2) X (k+2) 0..2 arrays with each 3 X 3 subblock having a positive determinant.
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5
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6396, 85950, 85950, 1119798, 2594364, 1119798, 14499921, 73704654, 73704654, 14499921, 189215295, 1983108841, 4397457795, 1983108841, 189215295, 2464134402, 56342354623, 247063804348, 247063804348, 56342354623, 2464134402
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OFFSET
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1,1
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COMMENTS
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Table starts:
.........6396..........85950.........1119798.........14499921........189215295
........85950........2594364........73704654.......1983108841......56342354623
......1119798.......73704654......4397457795.....247063804348...14979356975339
.....14499921.....1983108841....247063804348...29265455672501.3645051233578966
....189215295....56342354623..14979356975339.3645051233578966
...2464134402..1583479136326.883392377522107
..32080884108.43674791825894
.417846175365
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LINKS
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EXAMPLE
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Some solutions for 5 X 4:
..1..0..1..0....1..0..1..0....1..0..1..0....0..0..2..0....0..0..2..0
..2..0..0..2....2..0..0..1....1..0..0..2....1..0..0..1....1..0..0..1
..0..2..0..0....1..2..0..0....0..1..0..0....2..1..0..0....0..1..0..0
..0..1..2..0....2..0..2..1....2..1..2..1....0..1..2..0....0..1..2..0
..2..0..2..2....2..0..0..2....2..2..1..2....1..0..0..1....1..0..1..2
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CROSSREFS
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KEYWORD
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AUTHOR
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STATUS
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approved
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