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| n | a(n) |
|---|---|
| 1 | 318 |
| 2 | 1616 |
| 3 | 7070 |
| 4 | 34100 |
| 5 | 157872 |
| 6 | 752028 |
| 7 | 3530808 |
| 8 | 16789864 |
| 9 | 79293448 |
| 10 | 377319812 |
| 11 | 1788274836 |
| 12 | 8518844116 |
| 13 | 40475837046 |
| 14 | 193014313760 |
| 15 | 918808191844 |
| 16 | 4385300981366 |
| 17 | 20905548073454 |
| 18 | 99850385810890 |
| 19 | 476532537931898 |
[318,1616,7070,34100,157872,752028,3530808, 16789864,79293448,377319812,1788274836,8518844116, 40475837046,193014313760,918808191844, 4385300981366,20905548073454,99850385810890, 476532537931898] |