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A199709号
零和且两个邻居不相等的7个元素的-n..n数组x(0..6)的数量
1
56, 2642, 27854, 149942, 559028, 1643204, 4099204, 9059092, 18251656, 34171380, 60292468, 101279218, 163252890, 254042820, 383508158, 563826638, 809873706, 1139548482, 1574209250, 2139036592, 2863528108, 3781894246, 4933615190
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1,1
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第7行,共行A199704号
链接
配方奶粉
经验:a(n)=2*a(n-1)-a(n-3)-a
例子
n=5的一些解
.-4....2...-5....0...-4...-4...-5....0....1....1....0...-5....2...-5....1....2
..1...-5....2....2....1....2....1...-5....0...-5...-4....0...-5....0...-4....1
..5....3...-1...-2....4...-1....4...-3....3....1....4....4...-4....3...-3....2
..4....4....5....4...-4....3....2....1...-1....3...-1...-5....4....1....2...-1
.-1....3...-3....2....4...-1....5....2...-2...-2...-2...-1....2....3....5...-5
.-4...-4...-2...-5....1....2...-5....1....3...-1....5....4...-1...-2....0...-1
.-1...-3....4...-1...-2...-1...-2....4...-4....3...-2....3....2....0...-1....2
关键词
非n
作者
R.H.哈丁2011年11月9日
状态
经核准的