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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 2 |
| 2 | 7 |
| 3 | 48 |
| 4 | 613 |
| 5 | 12678 |
| 6 | 376635 |
| 7 | 14843748 |
| 8 | 736850985 |
| 9 | 44460709034 |
| 10 | 3178138510415 |
| 11 | 263969177593784 |
| 12 | 25092912792070221 |
| 13 | 2697122248172619374 |
| 14 | 324551651315721416259 |
| 15 | 43360400395276940296748 |
| 16 | 6386567528761097854601681 |
| 17 | 1030796192558122817118624722 |
| 18 | 181349613039877947587685266455 |
| 19 | 34616458231107257107670541291456 |
[1,2,7,48,613,12678,376635,14843748,736850985, 44460709034,3178138510415,263969177593784, 25092912792070221,2697122248172619374, 324551651315721416259,43360400395276940296748, 6386567528761097854601681, 1030796192558122817118624722, 181349613039877947587685266455, 34616458231107257107670541291456] |