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| n | a(n) |
|---|---|
| 1 | 2 |
| 2 | 34 |
| 3 | 341 |
| 4 | 2902 |
| 5 | 23092 |
| 6 | 178393 |
| 7 | 1359598 |
| 8 | 10296846 |
| 9 | 77752133 |
| 10 | 586292914 |
| 11 | 4418053928 |
| 12 | 33282217873 |
| 13 | 250685741074 |
| 14 | 1888064403826 |
| 15 | 14219675836741 |
| 16 | 107091705316446 |
| 17 | 806526755213324 |
| 18 | 6074075885446057 |
| 19 | 45744715781412614 |
| 20 | 344509590254476102 |
| 21 | 2594546978760459973 |
[2,34,341,2902,23092,178393,1359598,10296846, 77752133,586292914,4418053928,33282217873, 250685741074,1888064403826,14219675836741, 107091705316446,806526755213324,6074075885446057, 45744715781412614,344509590254476102, 2594546978760459973] |