n | a(n) |
---|---|
0 | 1 |
1 | 2 |
2 | 5 |
3 | 15 |
4 | 53 |
5 | 222 |
6 | 1120 |
7 | 6849 |
8 | 50111 |
9 | 427510 |
10 | 4142900 |
11 | 44693782 |
12 | 529276962 |
13 | 6813205468 |
14 | 94642629984 |
15 | 1410507388421 |
16 | 22445134308123 |
17 | 379776665469030 |
18 | 6808016435182620 |
19 | 128886547350655050 |
20 | 2569493300908367550 |
21 | 53805226930896987540 |
22 | 1180673761078007109840 |
[1,2,5,15,53,222,1120,6849,50111,427510,4142900, 44693782,529276962,6813205468,94642629984, 1410507388421,22445134308123,379776665469030, 6808016435182620,128886547350655050, 2569493300908367550,53805226930896987540, 1180673761078007109840] |