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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 2 |
| 2 | 14 |
| 3 | 162 |
| 4 | 2422 |
| 5 | 42366 |
| 6 | 824210 |
| 7 | 17315570 |
| 8 | 385569110 |
| 9 | 8985969258 |
| 10 | 217250577766 |
| 11 | 5413255505686 |
| 12 | 138331193497122 |
| 13 | 3611539459764086 |
| 14 | 96043941386294106 |
| 15 | 2595400550031689938 |
| 16 | 71127992129228040790 |
| 17 | 1973658406181654681730 |
| 18 | 55374306085337133154190 |
[1,2,14,162,2422,42366,824210,17315570,385569110, 8985969258,217250577766,5413255505686, 138331193497122,3611539459764086, 96043941386294106,2595400550031689938, 71127992129228040790,1973658406181654681730, 55374306085337133154190] |