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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 1 |
| 2 | 2 |
| 3 | 7 |
| 4 | 47 |
| 5 | 592 |
| 6 | 12287 |
| 7 | 374857 |
| 8 | 15639302 |
| 9 | 851542747 |
| 10 | 58536120467 |
| 11 | 4953497262712 |
| 12 | 505784457870707 |
| 13 | 61300510121162077 |
| 14 | 8698776162350603222 |
| 15 | 1428545280744850604767 |
| 16 | 268795232754158224790687 |
| 17 | 57445320930331531152213232 |
| 18 | 13837791987711934467999437927 |
[1,1,2,7,47,592,12287,374857,15639302,851542747, 58536120467,4953497262712,505784457870707, 61300510121162077,8698776162350603222, 1428545280744850604767,268795232754158224790687, 57445320930331531152213232, 13837791987711934467999437927] |