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| n | a(n) |
|---|---|
| 1 | 8 |
| 2 | 58 |
| 3 | 351 |
| 4 | 2258 |
| 5 | 14566 |
| 6 | 93654 |
| 7 | 602723 |
| 8 | 3879430 |
| 9 | 24968616 |
| 10 | 160704029 |
| 11 | 1034334465 |
| 12 | 6657250344 |
| 13 | 42847832116 |
| 14 | 275780068038 |
| 15 | 1774994012090 |
| 16 | 11424334508313 |
| 17 | 73530061800721 |
| 18 | 473259075639862 |
| 19 | 3046021548090702 |
| 20 | 19605006538323943 |
[8,58,351,2258,14566,93654,602723,3879430, 24968616,160704029,1034334465,6657250344, 42847832116,275780068038,1774994012090, 11424334508313,73530061800721,473259075639862, 3046021548090702,19605006538323943] |