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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 3 |
| 2 | 13 |
| 3 | 94 |
| 4 | 810 |
| 5 | 7667 |
| 6 | 76998 |
| 7 | 805560 |
| 8 | 8684533 |
| 9 | 95800850 |
| 10 | 1076159466 |
| 11 | 12268026894 |
| 12 | 141565916433 |
| 13 | 1650395185407 |
| 14 | 19409211522550 |
| 15 | 229984643863260 |
| 16 | 2743097412254490 |
| 17 | 32907239462485422 |
| 18 | 396793477697214450 |
| 19 | 4806417317271974580 |
| 20 | 58460150525944945840 |
| 21 | 713685698665966837135 |
| 22 | 8742060290902752902340 |
[1,3,13,94,810,7667,76998,805560,8684533,95800850, 1076159466,12268026894,141565916433,1650395185407, 19409211522550,229984643863260,2743097412254490, 32907239462485422,396793477697214450, 4806417317271974580,58460150525944945840, 713685698665966837135,8742060290902752902340] |