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| n | a(n) |
|---|---|
| 1 | 2 |
| 2 | 16 |
| 3 | 230 |
| 4 | 6478 |
| 5 | 472412 |
| 6 | 87541530 |
| 7 | 37121455086 |
| 8 | 35861331864570 |
| 9 | 81188767942820548 |
| 10 | 433324879893854403222 |
| 11 | 5417399373066905672590966 |
| 12 | 158241198424834434935170407538 |
| 13 | 10811858970416460513671922192330804 |
[2,16,230,6478,472412,87541530,37121455086, 35861331864570,81188767942820548, 433324879893854403222,5417399373066905672590966, 158241198424834434935170407538, 10811858970416460513671922192330804] |