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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 7 |
| 2 | 305 |
| 3 | 33367 |
| 4 | 6815585 |
| 5 | 2237423527 |
| 6 | 1077270776465 |
| 7 | 715153093789687 |
| 8 | 626055764653322945 |
| 9 | 698774745485355051847 |
| 10 | 968553361387420436695025 |
| 11 | 1632180870878422847476890007 |
| 12 | 3286322019402928956112227932705 |
| 13 | 7791592461957309952817483706344167 |
| 14 | 21485762937086358457367440231243675985 |
[1,7,305,33367,6815585,2237423527,1077270776465, 715153093789687,626055764653322945, 698774745485355051847,968553361387420436695025, 1632180870878422847476890007, 3286322019402928956112227932705, 7791592461957309952817483706344167, 21485762937086358457367440231243675985] |