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| n | a(n) |
|---|---|
| 1 | 2 |
| 2 | 4 |
| 3 | 88 |
| 4 | 3676 |
| 5 | 6320 |
| 6 | 8786 |
| 7 | 48743 |
| 8 | 51253 |
| 9 | 87617 |
| 10 | 3762554 |
| 11 | 6237442 |
| 12 | 9217100 |
| 13 | 3266298274 |
| 14 | 3520463764 |
| 15 | 6479536232 |
| 16 | 6733701722 |
| 17 | 8063694648 |
| 18 | 8317860138 |
| 19 | 4689524709430934474 |
| 20 | 5310475290569065522 |
| 21 | 7416797436703661747 |
[2,4,88,3676,6320,8786,48743,51253,87617,3762554, 6237442,9217100,3266298274,3520463764,6479536232, 6733701722,8063694648,8317860138, 4689524709430934474,5310475290569065522, 7416797436703661747] |