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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 1 |
| 2 | 715 |
| 3 | 29359 |
| 4 | 2649790 |
| 5 | 151696457 |
| 6 | 6380226905 |
| 7 | 205074295943 |
| 8 | 5265339073280 |
| 9 | 111499999690365 |
| 10 | 1997024724163755 |
| 11 | 30863092117426803 |
| 12 | 418329099990698130 |
| 13 | 5040543679296888213 |
| 14 | 54605890017229741905 |
| 15 | 537020682260761903611 |
[1,1,715,29359,2649790,151696457,6380226905, 205074295943,5265339073280,111499999690365, 1997024724163755,30863092117426803, 418329099990698130,5040543679296888213, 54605890017229741905,537020682260761903611] |