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| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 1 |
| 3 | 2 |
| 4 | 5 |
| 5 | 253 |
| 6 | 2657 |
| 7 | 1839533 |
| 8 | 11611594193 |
| 9 | 119221101341 |
| 10 | 3152002318138937 |
| 11 | 2390156990671551019 |
| 12 | 391219943696485871537172611 |
| 13 | 1374972518894998705708792681 |
| 14 | 21138479762006403022428257137861 |
[1,1,2,5,253,2657,1839533,11611594193, 119221101341,3152002318138937,2390156990671551019, 391219943696485871537172611, 1374972518894998705708792681, 21138479762006403022428257137861] |