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| n | a(n) |
|---|---|
| 1 | 256 |
| 2 | 1464 |
| 3 | 8770 |
| 4 | 55318 |
| 5 | 357516 |
| 6 | 2371070 |
| 7 | 15989568 |
| 8 | 109427750 |
| 9 | 756426182 |
| 10 | 5270764010 |
| 11 | 36928327652 |
| 12 | 259801640390 |
| 13 | 1832994682512 |
| 14 | 12959452955886 |
| 15 | 91756839230262 |
| 16 | 650341057828618 |
| 17 | 4612715227919740 |
| 18 | 32733695978222310 |
[256,1464,8770,55318,357516,2371070,15989568, 109427750,756426182,5270764010,36928327652, 259801640390,1832994682512,12959452955886, 91756839230262,650341057828618,4612715227919740, 32733695978222310] |