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A194498
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T(n,k)=Number of ways to arrange k nonattacking queens on the lower triangle of an n X n board
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6
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1, 0, 3, 0, 0, 6, 0, 0, 2, 10, 0, 0, 0, 12, 15, 0, 0, 0, 0, 38, 21, 0, 0, 0, 0, 12, 92, 28, 0, 0, 0, 0, 0, 82, 188, 36, 0, 0, 0, 0, 0, 8, 330, 344, 45, 0, 0, 0, 0, 0, 0, 118, 1008, 580, 55, 0, 0, 0, 0, 0, 0, 4, 802, 2566, 920, 66, 0, 0, 0, 0, 0, 0, 0, 114, 3708, 5742, 1390, 78, 0, 0, 0, 0, 0, 0, 0
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OFFSET
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1,3
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COMMENTS
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Table starts
...1....0......0.......0........0........0........0........0........0......0..0
...3....0......0.......0........0........0........0........0........0......0..0
...6....2......0.......0........0........0........0........0........0......0..0
..10...12......0.......0........0........0........0........0........0......0..0
..15...38.....12.......0........0........0........0........0........0......0..0
..21...92.....82.......8........0........0........0........0........0......0..0
..28..188....330.....118........4........0........0........0........0......0..0
..36..344...1008.....802......114........0........0........0........0......0..0
..45..580...2566....3708.....1384.......64........0........0........0......0..0
..55..920...5742...13280.....9890.....1644.......10........0........0......0..0
..66.1390..11652...39734....50662....19306.....1210........0........0......0..0
..78.2020..21926..104000...205512...146718....27198......484........0......0..0
..91.2842..38802..244948...698688...820218...322782....26084.......38......0..0
.105.3892..65322..530632..2074530..3670288..2564988...531344....14870......0..0
.120.5208.105428.1072776..5525902.13846830.15372702..6285270...629414...3656..0
.136.6832.164214.2048056.13476246.45661556.74615814.51834064.11949712.501700.56
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LINKS
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EXAMPLE
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Some solutions for n=6 k=4
..0............0............0............0............0............0
..0.0..........0.0..........0.1..........0.0..........1.0..........0.1
..1.0.0........1.0.0........0.0.0........0.0.1........0.0.1........0.0.0
..0.0.1.0......0.0.0.1......0.0.1.0......1.0.0.0......0.0.0.0......1.0.0.0
..0.0.0.0.1....0.1.0.0.0....1.0.0.0.0....0.0.0.1.0....0.1.0.0.0....0.0.1.0.0
..0.1.0.0.0.0..0.0.0.0.1.0..0.0.0.1.0.0..0.1.0.0.0.0..0.0.0.1.0.0..0.0.0.0.1.0
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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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