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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 4 |
| 2 | 69 |
| 3 | 5248 |
| 4 | 1107697 |
| 5 | 492911196 |
| 6 | 396643610629 |
| 7 | 522506795651464 |
| 8 | 1050188527130093313 |
| 9 | 3055485688346936896372 |
| 10 | 12353356560641179964896741 |
| 11 | 67171925010307462937573055504 |
| 12 | 478268992794023738033117638364209 |
| 13 | 4360663458863998067849091605547380428 |
[1,4,69,5248,1107697,492911196,396643610629, 522506795651464,1050188527130093313, 3055485688346936896372,12353356560641179964896741, 67171925010307462937573055504, 478268992794023738033117638364209, 4360663458863998067849091605547380428] |