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| n | a(n) |
|---|---|
| 1 | 11 |
| 2 | 242 |
| 3 | 1353 |
| 4 | 12623 |
| 5 | 47715 |
| 6 | 343145 |
| 7 | 1117207 |
| 8 | 7479533 |
| 9 | 22499181 |
| 10 | 150415627 |
| 11 | 429242911 |
| 12 | 2954085199 |
| 13 | 8086558295 |
| 14 | 58043181513 |
| 15 | 153186588731 |
| 16 | 1151896473495 |
| 17 | 2939148319421 |
| 18 | 23154681921613 |
| 19 | 57239339798173 |
| 20 | 471401152901559 |
[11,242,1353,12623,47715,343145,1117207,7479533, 22499181,150415627,429242911,2954085199, 8086558295,58043181513,153186588731,1151896473495, 2939148319421,23154681921613,57239339798173, 471401152901559] |