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| n | a(n) |
|---|---|
| 1 | 16 |
| 2 | 420 |
| 3 | 2665 |
| 4 | 21825 |
| 5 | 168051 |
| 6 | 1361115 |
| 7 | 11056918 |
| 8 | 90607484 |
| 9 | 744476711 |
| 10 | 6128725337 |
| 11 | 50505657943 |
| 12 | 416410008391 |
| 13 | 3434291565162 |
| 14 | 28328056127096 |
| 15 | 233686613328253 |
| 16 | 1927836538740757 |
| 17 | 15904394556151648 |
| 18 | 131210860066827373 |
[16,420,2665,21825,168051,1361115,11056918, 90607484,744476711,6128725337,50505657943, 416410008391,3434291565162,28328056127096, 233686613328253,1927836538740757, 15904394556151648,131210860066827373] |