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| n | a(n) |
|---|---|
| 1 | 11 |
| 2 | 76 |
| 3 | 521 |
| 4 | 3588 |
| 5 | 24719 |
| 6 | 170270 |
| 7 | 1172854 |
| 8 | 8078859 |
| 9 | 55648831 |
| 10 | 383320506 |
| 11 | 2640389883 |
| 12 | 18187544432 |
| 13 | 125279518221 |
| 14 | 862950891715 |
| 15 | 5944181874953 |
| 16 | 40944737993493 |
| 17 | 282035712335780 |
| 18 | 1942719551542674 |
| 19 | 13381848790314938 |
[11,76,521,3588,24719,170270,1172854,8078859, 55648831,383320506,2640389883,18187544432, 125279518221,862950891715,5944181874953, 40944737993493,282035712335780,1942719551542674, 13381848790314938] |