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| n | a(n) |
|---|---|
| 1 | 3 |
| 2 | 71 |
| 3 | 583 |
| 4 | 5287 |
| 5 | 46841 |
| 6 | 417809 |
| 7 | 3721925 |
| 8 | 33169105 |
| 9 | 295565367 |
| 10 | 2633809823 |
| 11 | 23469955635 |
| 12 | 209141864227 |
| 13 | 1863672026457 |
| 14 | 16607262667561 |
| 15 | 147988036529381 |
| 16 | 1318727810932497 |
| 17 | 11751240682625031 |
| 18 | 104715815140064955 |
[3,71,583,5287,46841,417809,3721925,33169105, 295565367,2633809823,23469955635,209141864227, 1863672026457,16607262667561,147988036529381, 1318727810932497,11751240682625031, 104715815140064955] |