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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 2 |
| 2 | 5 |
| 3 | 21 |
| 4 | 34 |
| 5 | 186 |
| 6 | 454 |
| 7 | 1927 |
| 8 | 2746 |
| 9 | 11128 |
| 10 | 30906 |
| 11 | 70762 |
| 12 | 349068 |
| 13 | 830170 |
| 14 | 2278644 |
| 15 | 13219495 |
| 16 | 27373350 |
| 17 | 87615127 |
[1,2,5,21,34,186,454,1927,2746,11128,30906,70762, 349068,830170,2278644,13219495,27373350,87615127] |