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| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 14 |
| 3 | 461 |
| 4 | 2205 |
| 5 | 12161 |
| 6 | 205888 |
| 7 | 2748026 |
| 8 | 25141813 |
| 9 | 257022624 |
| 10 | 3107723264 |
| 11 | 35428053457 |
| 12 | 379567391600 |
| 13 | 4182220329864 |
| 14 | 47242475898249 |
| 15 | 526748427926749 |
| 16 | 5818430376752828 |
| 17 | 64655311668945484 |
| 18 | 721026932221046595 |
[1,14,461,2205,12161,205888,2748026,25141813, 257022624,3107723264,35428053457,379567391600, 4182220329864,47242475898249,526748427926749, 5818430376752828,64655311668945484, 721026932221046595] |