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| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 104 |
| 3 | 2919 |
| 4 | 15624 |
| 5 | 52529 |
| 6 | 146956 |
| 7 | 385284 |
| 8 | 979866 |
| 9 | 2440042 |
| 10 | 5946178 |
| 11 | 14218134 |
| 12 | 33491002 |
| 13 | 77932633 |
| 14 | 179450414 |
| 15 | 409349989 |
| 16 | 926267006 |
| 17 | 2081273523 |
| 18 | 4647417316 |
| 19 | 10319376525 |
| 20 | 22798153410 |
| 21 | 50137931781 |
| 22 | 109808283414 |
| 23 | 239585399751 |
[1,104,2919,15624,52529,146956,385284,979866, 2440042,5946178,14218134,33491002,77932633, 179450414,409349989,926267006,2081273523, 4647417316,10319376525,22798153410,50137931781, 109808283414,239585399751] |