n | a(n) |
---|---|
0 | 1 |
1 | 2 |
2 | 5 |
3 | 15 |
4 | 52 |
5 | 205 |
6 | 921 |
7 | 4766 |
8 | 28685 |
9 | 201159 |
10 | 1630840 |
11 | 15071725 |
12 | 156331161 |
13 | 1794763970 |
14 | 22548418541 |
15 | 307236496071 |
16 | 4507944378004 |
17 | 70813851019717 |
18 | 1185225078743601 |
19 | 21049903662123422 |
20 | 395303080572770549 |
21 | 7825181077750155999 |
22 | 162835332607069248760 |
[1,2,5,15,52,205,921,4766,28685,201159,1630840, 15071725,156331161,1794763970,22548418541, 307236496071,4507944378004,70813851019717, 1185225078743601,21049903662123422, 395303080572770549,7825181077750155999, 162835332607069248760] |