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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 2 |
| 2 | 10 |
| 3 | 62 |
| 4 | 466 |
| 5 | 4094 |
| 6 | 40834 |
| 7 | 453422 |
| 8 | 5528530 |
| 9 | 73245086 |
| 10 | 1045617442 |
| 11 | 15974829710 |
| 12 | 259729905394 |
| 13 | 4472698102526 |
| 14 | 81249057380674 |
| 15 | 1551476854161134 |
| 16 | 31047024669646354 |
| 17 | 649336273468833374 |
| 18 | 14159652822131771746 |
| 19 | 321245505385300938062 |
| 20 | 7568059628217164709682 |
[1,2,10,62,466,4094,40834,453422,5528530,73245086, 1045617442,15974829710,259729905394,4472698102526, 81249057380674,1551476854161134,31047024669646354, 649336273468833374,14159652822131771746, 321245505385300938062,7568059628217164709682] |