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例子
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4, 6, 10, 14, 22, 26, 34, 38, 46, 58,...
6, 9, 15, 21, 33, 39, 51, 57, 69, 87,...
10, 15, 25, 35, 55, 65, 85, 95,115,145,...
14, 21, 35, 49, 77, 91,119,133,161,203,...
22, 33, 55, 77,121,143,187,209,253,319,...
26, 39, 65, 91,143,169,221,247,299,377,...
34, 51, 85,119,187,221,289,323,391,493,...
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