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| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 2 |
| 3 | 8 |
| 4 | 61 |
| 5 | 822 |
| 6 | 17914 |
| 7 | 571475 |
| 8 | 24566756 |
| 9 | 1346167320 |
| 10 | 90729050427 |
| 11 | 7341861588316 |
| 12 | 700870085606926 |
| 13 | 77858914606919461 |
| 14 | 9954018225212149326 |
| 15 | 1450980922023874162612 |
[1,2,8,61,822,17914,571475,24566756,1346167320, 90729050427,7341861588316,700870085606926, 77858914606919461,9954018225212149326, 1450980922023874162612] |