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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 1 |
| 2 | 5 |
| 3 | 21 |
| 4 | 357 |
| 5 | 5797 |
| 6 | 376805 |
| 7 | 24208613 |
| 8 | 6221613541 |
| 9 | 1594283908581 |
| 10 | 1634141006295525 |
| 11 | 1673768626404966885 |
| 12 | 6857430062381149327845 |
| 13 | 28089747579101385828291045 |
| 14 | 460250514083576206796548772325 |
| 15 | 7540859480106603961931048583270885 |
[1,1,5,21,357,5797,376805,24208613,6221613541, 1594283908581,1634141006295525, 1673768626404966885,6857430062381149327845, 28089747579101385828291045, 460250514083576206796548772325, 7540859480106603961931048583270885] |