n | a(n) |
---|---|
1 | 2 |
2 | 6 |
3 | 10 |
4 | 18 |
5 | 35 |
6 | 49 |
7 | 108 |
8 | 181 |
9 | 346 |
10 | 651 |
11 | 1236 |
12 | 2348 |
13 | 4240 |
14 | 8454 |
15 | 16537 |
16 | 30963 |
17 | 60986 |
18 | 118814 |
19 | 225337 |
20 | 438305 |
21 | 854049 |
[2,6,10,18,35,49,108,181,346,651,1236,2348,4240, 8454,16537,30963,60986,118814,225337,438305, 854049] |