这串数很是怪怪的, 后面数字大的数字串可以有, 前面数字小的数字串反倒不好找。取1/6。
1环: 0, 1, 2, 10, 32, 124, 0440, 1624, 05888, 021520, 0078368, 0285856, 01041920, 003798976,
2环: 0, 1, 2, 15, 60, 321,
3环: 0, 1, 2, 15, 60, 340, 1680, 9094,
4环: 0, 1, 2, 15, 60, 340, 1680, 9135, 48440,
5环: 0, 1, 2, 15, 60, 340, 1680, 9135, 48440, 264726, 1446060,
6环: 0, 1, 2, 15, 60, 340, 1680, 9135, 48440, 264726, 1446060, 7996296, 44396352,
7环: 0, 1, 2, 15, 60, 340, 1680, 9135, 48440, 264726, 1446060, 7996296, 44396352, 248133600,
8环: 0, 1, 2, 15, 60, 340, 1680, 9135, 48440, 264726, 1446060, 7996296, 44396352, 248133600,
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