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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 1 |
| 2 | 5 |
| 3 | 109 |
| 4 | 3177 |
| 5 | 227961 |
| 6 | 15773229 |
| 7 | 2521786149 |
| 8 | 294715261521 |
| 9 | 91106569198449 |
| 10 | 14283819393505749 |
| 11 | 8353531761471301725 |
| 12 | 1366332291998753348025 |
| 13 | 1671117489759750577634025 |
| 14 | 171277162439935833445571325 |
| 15 | 660477991317304143815464418325 |
[1,1,5,109,3177,227961,15773229,2521786149, 294715261521,91106569198449,14283819393505749, 8353531761471301725,1366332291998753348025, 1671117489759750577634025, 171277162439935833445571325, 660477991317304143815464418325] |