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| n | a(n) |
|---|---|
| 1 | 1278 |
| 2 | 8236 |
| 3 | 53167 |
| 4 | 373804 |
| 5 | 2671962 |
| 6 | 18401364 |
| 7 | 125750824 |
| 8 | 872440876 |
| 9 | 6089994150 |
| 10 | 42113161848 |
| 11 | 291069201134 |
| 12 | 2016256423968 |
| 13 | 14003302227390 |
| 14 | 96905004811952 |
| 15 | 671377683662330 |
| 16 | 4648755970028064 |
| 17 | 32248931393362930 |
| 18 | 223222561428051576 |
[1278,8236,53167,373804,2671962,18401364, 125750824,872440876,6089994150,42113161848, 291069201134,2016256423968,14003302227390, 96905004811952,671377683662330,4648755970028064, 32248931393362930,223222561428051576] |