n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 2 |
3 | 5 |
4 | 14 |
5 | 42 |
6 | 134 |
7 | 444 |
8 | 1518 |
9 | 5318 |
10 | 18989 |
11 | 68856 |
12 | 252901 |
13 | 938847 |
14 | 3517082 |
15 | 13278844 |
16 | 50475876 |
17 | 193014868 |
18 | 741963015 |
19 | 2865552848 |
20 | 11113696421 |
21 | 43266626430 |
22 | 169019868095 |
23 | 662337418989 |
24 | 2602923589451 |
25 | 10256100717875 |
[1,1,2,5,14,42,134,444,1518,5318,18989,68856, 252901,938847,3517082,13278844,50475876,193014868, 741963015,2865552848,11113696421,43266626430, 169019868095,662337418989,2602923589451, 10256100717875] |