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| n | a(n) |
|---|---|
| 1 | 18 |
| 2 | 3035 |
| 3 | 145151 |
| 4 | 8296414 |
| 5 | 479355276 |
| 6 | 24453863816 |
| 7 | 1173005308130 |
| 8 | 54380015507778 |
| 9 | 2444489580748461 |
| 10 | 107205187820814508 |
| 11 | 4615557211555598479 |
| 12 | 195894558236312186300 |
| 13 | 8220519759791018782780 |
| 14 | 341888951779349913222920 |
[18,3035,145151,8296414,479355276,24453863816, 1173005308130,54380015507778,2444489580748461, 107205187820814508,4615557211555598479, 195894558236312186300,8220519759791018782780, 341888951779349913222920] |