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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 1 |
| 2 | 1 |
| 3 | 3 |
| 4 | 4 |
| 5 | 16 |
| 6 | 87 |
| 7 | 202 |
| 8 | 607 |
| 9 | 1441 |
| 10 | 4708 |
| 11 | 41888 |
| 12 | 44741 |
| 13 | 339108 |
| 14 | 1617551 |
[1,1,1,3,4,16,87,202,607,1441,4708,41888,44741, 339108,1617551] |