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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 3 |
| 2 | 6 |
| 3 | 36 |
| 4 | 561 |
| 5 | 98211 |
| 6 | 43176384 |
| 7 | 116622937722 |
| 8 | 1022189210900601 |
| 9 | 41675008108242048327 |
| 10 | 6377839090284322052067558 |
| 11 | 4114890941608928235401688095580 |
| 12 | 10460015732506081308723488849683574907 |
| 13 | 108482611110966450613465001912856742180485969 |
[1,3,6,36,561,98211,43176384,116622937722, 1022189210900601,41675008108242048327, 6377839090284322052067558, 4114890941608928235401688095580, 10460015732506081308723488849683574907, 108482611110966450613465001912856742180485969] |