搜索： 编号：a209115
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A209115型
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| T（n，k）=标有数字的n珠项链的数量-k.k不允许反转，求和为零，并避免图案zz+1 z+2和zz-1 z-2。 |
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1, 1, 2, 1, 3, 1, 1, 4, 5, 5, 1, 5, 11, 22, 5, 1, 6, 19, 55, 63, 15, 1, 7, 29, 120, 261, 238, 25, 1, 8, 41, 221, 741, 1373, 865, 68, 1, 9, 55, 362, 1683, 5032, 7377, 3417, 139, 1, 10, 71, 559, 3325, 14037, 35253, 41256, 13607, 354, 1, 11, 89, 816, 5935, 32802, 121117, 255821
(列表;桌子;图表;参考;听;历史;文本;内部格式)
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1,3
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表格开始
..1....1.....1......1.......1.......1.......1........1........1.........1
..2....3.....4......5.......6.......7.......8........9.......10........11
..1....5....11.....19......29......41......55.......71.......89.......109
..5...22....55....120.....221.....362.....559......816.....1137......1538
..5...63...261....741....1683....3325....5935.....9835....15397.....23039
.15..238..1373...5032...14037...32802...67681...127310...222965....368920
.25..865..7377.35253.121117..336055..802125..1712987.3357255.6145113
.68.3417.41256.255821.1079992.3552027.9804610.23766209.52113718.105515163
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例子
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n=6，k=6的一些解：
.-3...-4...-5...-4...-6...-6...-5...-6...-5...-4...-2...-4...-3...-5...-4...-6
.-3...-1....1...-2...-2....0....2....2...-2...-2...-2...-3...-1...-1....2...-1
..0...-2...-1....4....3....4...-2....0....5...-1...-2....1....0....4...-1....2
..4....2....2....4...-1....0....5....6....4...-3....2....2....2...-2....3...-2
..4....5....0...-1....0....4...-5....2...-2....6...-1....2....4....5....1....5
.-2....0....3...-1....6...-2....5...-4....0....4....5....2...-2...-1...-1....2
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