n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 2 |
3 | 5 |
4 | 15 |
5 | 52 |
6 | 205 |
7 | 921 |
8 | 4807 |
9 | 30288 |
10 | 243338 |
11 | 2636799 |
12 | 39930125 |
13 | 851799936 |
14 | 25433798924 |
15 | 1055317281976 |
16 | 60604557533320 |
17 | 4808635126697325 |
18 | 526853206940116357 |
19 | 79701484897115170371 |
20 | 16651360300285759198344 |
[1,1,2,5,15,52,205,921,4807,30288,243338,2636799, 39930125,851799936,25433798924,1055317281976, 60604557533320,4808635126697325, 526853206940116357,79701484897115170371, 16651360300285759198344] |