n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 2 |
3 | 5 |
4 | 16 |
5 | 60 |
6 | 248 |
7 | 1098 |
8 | 5127 |
9 | 24996 |
10 | 126353 |
11 | 658914 |
12 | 3531891 |
13 | 19406185 |
14 | 109079066 |
15 | 626240743 |
16 | 3668020847 |
17 | 21899151005 |
18 | 133179027307 |
19 | 824588095681 |
20 | 5195945625141 |
21 | 33311336524674 |
22 | 217230789307751 |
23 | 1440698723164953 |
[1,1,2,5,16,60,248,1098,5127,24996,126353,658914, 3531891,19406185,109079066,626240743,3668020847, 21899151005,133179027307,824588095681, 5195945625141,33311336524674,217230789307751, 1440698723164953] |