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例子
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三角形开始：
2* 3;
2* 2, 3* 2;
2*7、3*7、5*7；
2*5、3*5、5*5、7*5；
2*13、3*13、5*13、7*13、11*13；
2*11, 3*11, 5*11, 7*11,11*11,13*11;
2*19, 3*19, 5*19, 7*19,11*19,13*19,17*19;
2*17, 3*17, 5*17, 7*17,11*17,13*17,17*17,19*17;
2*29, 3*29, 5*29, 7*29,11*29,13*29,17*29,19*29,23*29;
2*23, 3*23, 5*23, 7*23,11*23,13*23,17*23,19*23,23*23,29*23;
...
=
6;
4,6;
14,21,35;
10,15,25,35;
26,39,65,91,143;
22,33,55,77,121,143;
38,57,95,133,209,247,323;
34,51,85,119,187,221,289,323;
58,87,145,203,319,377,493,551,667;
46,69,115,161,253,299,391,437,529,667;
...
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