n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 2 |
3 | 5 |
4 | 15 |
5 | 55 |
6 | 239 |
7 | 1199 |
8 | 6810 |
9 | 43108 |
10 | 300731 |
11 | 2291162 |
12 | 18923688 |
13 | 168402163 |
14 | 1606199354 |
15 | 16345042652 |
16 | 176758631046 |
17 | 2024225038882 |
18 | 24471719797265 |
19 | 311446235344127 |
20 | 4162172487402027 |
21 | 58275220793611957 |
22 | 853045299274146032 |
[1,1,2,5,15,55,239,1199,6810,43108,300731,2291162, 18923688,168402163,1606199354,16345042652, 176758631046,2024225038882,24471719797265, 311446235344127,4162172487402027, 58275220793611957,853045299274146032] |