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| n | a(n) |
|---|---|
| 1 | 6 |
| 2 | 120 |
| 3 | 2114 |
| 4 | 35413 |
| 5 | 557432 |
| 6 | 8313608 |
| 7 | 119085643 |
| 8 | 1641434223 |
| 9 | 21968751393 |
| 10 | 286602316306 |
| 11 | 3658119581129 |
| 12 | 45840023294595 |
| 13 | 565061162009598 |
| 14 | 6868648590255302 |
| 15 | 82463672861242529 |
| 16 | 979223612521821703 |
[6,120,2114,35413,557432,8313608,119085643, 1641434223,21968751393,286602316306,3658119581129, 45840023294595,565061162009598,6868648590255302, 82463672861242529,979223612521821703] |