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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 12 |
| 2 | 97 |
| 3 | 696 |
| 4 | 4784 |
| 5 | 32230 |
| 6 | 214978 |
| 7 | 1426566 |
| 8 | 9441417 |
| 9 | 62405645 |
| 10 | 412278981 |
| 11 | 2723566163 |
| 12 | 17996243101 |
| 13 | 118957645301 |
| 14 | 786700165122 |
| 15 | 5205396517853 |
| 16 | 34461624895701 |
| 17 | 228274455988134 |
| 18 | 1512920531980961 |
| 19 | 10032446308837778 |
[1,12,97,696,4784,32230,214978,1426566,9441417, 62405645,412278981,2723566163,17996243101, 118957645301,786700165122,5205396517853, 34461624895701,228274455988134,1512920531980961, 10032446308837778] |