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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 12 |
| 2 | 433 |
| 3 | 5208 |
| 4 | 187921 |
| 5 | 2260260 |
| 6 | 81557281 |
| 7 | 980947632 |
| 8 | 35395672033 |
| 9 | 425729012028 |
| 10 | 15361640105041 |
| 11 | 184765410272520 |
| 12 | 6666916409915761 |
| 13 | 80187762329261652 |
| 14 | 2893426360263335233 |
| 15 | 34801304085489284448 |
| 16 | 1255740373437877575361 |
[1,12,433,5208,187921,2260260,81557281,980947632, 35395672033,425729012028,15361640105041, 184765410272520,6666916409915761, 80187762329261652,2893426360263335233, 34801304085489284448,1255740373437877575361] |