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| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 3 |
| 3 | 14 |
| 4 | 48 |
| 5 | 269 |
| 6 | 1615 |
| 7 | 12662 |
| 8 | 73528 |
| 9 | 836817 |
| 10 | 8476243 |
| 11 | 99348534 |
| 12 | 948849176 |
| 13 | 13193115597 |
| 14 | 177346261391 |
| 15 | 3684976294222 |
| 16 | 45021819481808 |
| 17 | 734808219625345 |
| 18 | 13524660020400771 |
| 19 | 290452222949307070 |
| 20 | 4639956700466396256 |
| 21 | 128621330002689008237 |
| 22 | 2735863084773695212719 |
[1,3,14,48,269,1615,12662,73528,836817,8476243, 99348534,948849176,13193115597,177346261391, 3684976294222,45021819481808,734808219625345, 13524660020400771,290452222949307070, 4639956700466396256,128621330002689008237, 2735863084773695212719] |