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| n | a(n) |
|---|---|
| 1 | 2 |
| 2 | 2 |
| 3 | 4 |
| 4 | 2 |
| 5 | 7 |
| 6 | 22 |
| 7 | 2 |
| 8 | 13 |
| 9 | 66 |
| 10 | 258 |
| 11 | 2 |
| 12 | 25 |
| 13 | 189 |
| 14 | 898 |
| 15 | 3528 |
| 16 | 2 |
| 17 | 49 |
| 18 | 537 |
| 19 | 3118 |
| 20 | 14545 |
| 21 | 87830 |
| 22 | 2 |
| 23 | 97 |
| 24 | 1544 |
| 25 | 11462 |
| 26 | 75446 |
| 27 | 746589 |
| 28 | 8295536 |
| 29 | 2 |
| 30 | 193 |
| 31 | 4508 |
| 32 | 44990 |
| 33 | 447667 |
[2,2,4,2,7,22,2,13,66,258,2,25,189,898,3528,2,49, 537,3118,14545,87830,2,97,1544,11462,75446,746589, 8295536,2,193,4508,44990,447667] |