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| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 12 |
| 3 | 13 |
| 4 | 24 |
| 5 | 153 |
| 6 | 627 |
| 7 | 4819 |
| 8 | 5031 |
| 9 | 6223 |
| 10 | 7445 |
| 11 | 8617 |
| 12 | 985900 |
| 13 | 3112632 |
| 14 | 4253677 |
| 15 | 4849508 |
| 16 | 16213749 |
| 17 | 58657980 |
| 18 | 90031121 |
| 19 | 324653627 |
| 20 | 482950316 |
| 21 | 2737445864 |
| 22 | 7985900811 |
| 23 | 26324153677 |
| 24 | 489950816253 |
| 25 | 74958607980900 |
| 26 | 311213241536274 |
[1,12,13,24,153,627,4819,5031,6223,7445,8617, 985900,3112632,4253677,4849508,16213749,58657980, 90031121,324653627,482950316,2737445864, 7985900811,26324153677,489950816253, 74958607980900,311213241536274] |