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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 1 |
| 2 | 8 |
| 3 | 117 |
| 4 | 2596 |
| 5 | 77705 |
| 6 | 2936406 |
| 7 | 134228059 |
| 8 | 7204913528 |
| 9 | 444331053873 |
| 10 | 30963240318250 |
| 11 | 2406301353714731 |
| 12 | 206354828717754036 |
| 13 | 19357367027097743449 |
| 14 | 1971809610601104110942 |
| 15 | 216754216326949771274715 |
| 16 | 25575749384428387961718256 |
| 17 | 3224227609551980271408565985 |
[1,1,8,117,2596,77705,2936406,134228059, 7204913528,444331053873,30963240318250, 2406301353714731,206354828717754036, 19357367027097743449,1971809610601104110942, 216754216326949771274715, 25575749384428387961718256, 3224227609551980271408565985] |