n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 2 |
3 | 6 |
4 | 24 |
5 | 120 |
6 | 694 |
7 | 4676 |
8 | 35952 |
9 | 310464 |
10 | 2984176 |
11 | 31536583 |
12 | 363591384 |
13 | 4541789148 |
14 | 61089594448 |
15 | 880428095803 |
16 | 13534614549829 |
17 | 221066397540186 |
18 | 3823205871530350 |
19 | 69792946997645295 |
20 | 1341134146478847104 |
21 | 27059669661295560098 |
22 | 571973335506443017436 |
[1,1,2,6,24,120,694,4676,35952,310464,2984176, 31536583,363591384,4541789148,61089594448, 880428095803,13534614549829,221066397540186, 3823205871530350,69792946997645295, 1341134146478847104,27059669661295560098, 571973335506443017436] |