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| n | a(n) |
|---|---|
| 1 | 12 |
| 2 | 70 |
| 3 | 88 |
| 4 | 180 |
| 5 | 1888 |
| 6 | 4030 |
| 7 | 5830 |
| 8 | 32128 |
| 9 | 521728 |
| 10 | 1848964 |
| 11 | 8378368 |
| 12 | 34359083008 |
| 13 | 66072609790 |
| 14 | 549753192448 |
| 15 | 259708613909470 |
[12,70,88,180,1888,4030,5830,32128,521728,1848964, 8378368,34359083008,66072609790,549753192448, 259708613909470] |