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1, 3, 10, 35, 132, 524, 2145, 8924, 37693, 161604, 701218, 3068181, 13515463, 59931900, 267372422, 1198695390, 5395604431, 24377747242, 110533789419, 502767066982, 2293016680176, 10483543994331, 48042092202958, 220635526540888, 1015233950976577, 4679668922908784, 21606351450045311
(列表;图表;参考;听;历史;文本;内部格式)
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