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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 1 |
| 2 | 9 |
| 3 | 271 |
| 4 | 19353 |
| 5 | 2699251 |
| 6 | 650553183 |
| 7 | 248978967973 |
| 8 | 142238892608025 |
| 9 | 115699539306013867 |
| 10 | 129097362200437841259 |
| 11 | 191726066802105786953113 |
| 12 | 369666963359241578736653775 |
| 13 | 906204961889202975320635813201 |
| 14 | 2774573804997927027583123365125685 |
[1,1,9,271,19353,2699251,650553183,248978967973, 142238892608025,115699539306013867, 129097362200437841259,191726066802105786953113, 369666963359241578736653775, 906204961889202975320635813201, 2774573804997927027583123365125685] |