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| n | a(n) |
|---|---|
| 1 | 9 |
| 2 | 46 |
| 3 | 230 |
| 4 | 1152 |
| 5 | 5688 |
| 6 | 27986 |
| 7 | 137082 |
| 8 | 670608 |
| 9 | 3275574 |
| 10 | 15987988 |
| 11 | 77980390 |
| 12 | 380145754 |
| 13 | 1852275976 |
| 14 | 9021572492 |
| 15 | 43923360572 |
| 16 | 213777365336 |
[9,46,230,1152,5688,27986,137082,670608,3275574, 15987988,77980390,380145754,1852275976,9021572492, 43923360572,213777365336] |