| k | Forward computation | GCF based solution | Exact solution |
| 0 | 1 | 1 | 1 |
| 1 | 0.333333 | 0.3333 | 0.3333 |
| 2 | 0.111111 | 0.1111 | 0.1111 |
| 3 | 0.03704 | 0.03704 | 0.03704 |
| 4 | 0.01235 | 0.01235 | 0.01235 |
| 5 | 0.004115 | 0.004115 | 0.004115 |
| 6 | 0.001372 | 0.001372 | 0.001372 |
| 7 |
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| 8 |
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| 10 |
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| 12 |
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| 15 |
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| 20 |
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| 25 |
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| 30 |
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| 40 |
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| 50 |
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| 90 |
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