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| n | a(n) |
|---|---|
| 1 | 12 |
| 2 | 416 |
| 3 | 13062 |
| 4 | 286920 |
| 5 | 6296324 |
| 6 | 128768496 |
| 7 | 2561487246 |
| 8 | 49811090624 |
| 9 | 951678283294 |
| 10 | 17942875499666 |
| 11 | 334648098052706 |
| 12 | 6186474258515070 |
| 13 | 113524128817623768 |
| 14 | 2070195868615817640 |
| 15 | 37549019984769514068 |
[12,416,13062,286920,6296324,128768496,2561487246, 49811090624,951678283294,17942875499666, 334648098052706,6186474258515070, 113524128817623768,2070195868615817640, 37549019984769514068] |