n | a(n) |
---|---|
1 | 1 |
2 | 2 |
3 | 9 |
4 | 13 |
5 | 29 |
6 | 87 |
7 | 299 |
8 | 917 |
9 | 2589 |
10 | 7059 |
11 | 19075 |
12 | 51111 |
13 | 135445 |
14 | 355377 |
15 | 925723 |
16 | 2398807 |
17 | 6190289 |
18 | 15920685 |
19 | 40835851 |
20 | 104520403 |
21 | 267077847 |
[1,2,9,13,29,87,299,917,2589,7059,19075,51111, 135445,355377,925723,2398807,6190289,15920685, 40835851,104520403,267077847] |