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| n | a(n) |
|---|---|
| 1 | 2 |
| 2 | 14 |
| 3 | 101 |
| 4 | 709 |
| 5 | 4963 |
| 6 | 34744 |
| 7 | 243210 |
| 8 | 1702470 |
| 9 | 11917293 |
| 10 | 83421053 |
| 11 | 583947371 |
| 12 | 4087631600 |
| 13 | 28613421202 |
| 14 | 200293948414 |
| 15 | 1402057638901 |
| 16 | 9814403472309 |
| 17 | 68700824306163 |
| 18 | 480905770143144 |
| 19 | 3366340391002010 |
[2,14,101,709,4963,34744,243210,1702470,11917293, 83421053,583947371,4087631600,28613421202, 200293948414,1402057638901,9814403472309, 68700824306163,480905770143144,3366340391002010] |