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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 2 |
| 2 | 20 |
| 3 | 662 |
| 4 | 80744 |
| 5 | 38724842 |
| 6 | 75185316860 |
| 7 | 593940189201662 |
| 8 | 19026394370724334544 |
| 9 | 2460515237682283759296722 |
| 10 | 1280059938187721964276628432100 |
| 11 | 2672755638642586172344574379667166822 |
| 12 | 22366135140308331991861876017552822964355384 |
| 13 | 749476887752252949738787898479359344347670538150842 |
[1,2,20,662,80744,38724842,75185316860, 593940189201662,19026394370724334544, 2460515237682283759296722, 1280059938187721964276628432100, 2672755638642586172344574379667166822, 22366135140308331991861876017552822964355384, 74947688775225294973878789847935934434767053815084\ 2] |