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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 1 |
| 2 | 9 |
| 3 | 588 |
| 4 | 123464 |
| 5 | 55567352 |
| 6 | 44056912182 |
| 7 | 54667189410224 |
| 8 | 98149884074667116 |
| 9 | 241192889005578902877 |
| 10 | 778400276435728381405745 |
| 11 | 3195674736701993615997749350 |
| 12 | 16272552341081798500863569890566 |
| 13 | 100683204917037438858515986247835992 |
[1,1,9,588,123464,55567352,44056912182, 54667189410224,98149884074667116, 241192889005578902877,778400276435728381405745, 3195674736701993615997749350, 16272552341081798500863569890566, 100683204917037438858515986247835992] |