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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 1 |
| 2 | 9 |
| 3 | 265 |
| 4 | 14833 |
| 5 | 1334961 |
| 6 | 176214841 |
| 7 | 32071101049 |
| 8 | 7697064251745 |
| 9 | 2355301661033953 |
| 10 | 895014631192902121 |
| 11 | 413496759611120779881 |
| 12 | 228250211305338670494289 |
| 13 | 148362637348470135821287825 |
| 14 | 112162153835443422680893595673 |
| 15 | 97581073836835777732377428235481 |
[1,1,9,265,14833,1334961,176214841,32071101049, 7697064251745,2355301661033953,895014631192902121, 413496759611120779881,228250211305338670494289, 148362637348470135821287825, 112162153835443422680893595673, 97581073836835777732377428235481] |