n | a(n) |
---|---|
0 | 1 |
1 | 3 |
2 | 11 |
3 | 45 |
4 | 195 |
5 | 873 |
6 | 3989 |
7 | 18483 |
8 | 86515 |
9 | 408105 |
10 | 1936881 |
11 | 9238023 |
12 | 44241261 |
13 | 212601015 |
14 | 1024642875 |
15 | 4950790605 |
16 | 23973456915 |
17 | 116312293305 |
18 | 565280386625 |
19 | 2751474553575 |
20 | 13411044301945 |
21 | 65448142561035 |
22 | 319756851757695 |
[1,3,11,45,195,873,3989,18483,86515,408105, 1936881,9238023,44241261,212601015,1024642875, 4950790605,23973456915,116312293305,565280386625, 2751474553575,13411044301945,65448142561035, 319756851757695] |