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| n | a(n) |
|---|---|
| 1 | 2 |
| 2 | 3 |
| 3 | 8 |
| 4 | 21 |
| 5 | 34 |
| 6 | 987 |
| 7 | 2584 |
| 8 | 6765 |
| 9 | 10946 |
| 10 | 75025 |
| 11 | 196418 |
| 12 | 9227465 |
| 13 | 14930352 |
| 14 | 7778742049 |
| 15 | 20365011074 |
| 16 | 225851433717 |
| 17 | 365435296162 |
| 18 | 10610209857723 |
| 19 | 27777890035288 |
| 20 | 72723460248141 |
| 21 | 117669030460994 |
| 22 | 3416454622906707 |
| 23 | 8944394323791464 |
| 24 | 23416728348467685 |
[2,3,8,21,34,987,2584,6765,10946,75025,196418, 9227465,14930352,7778742049,20365011074, 225851433717,365435296162,10610209857723, 27777890035288,72723460248141,117669030460994, 3416454622906707,8944394323791464, 23416728348467685] |