n | a(n) |
---|---|
0 | 1 |
1 | 2 |
2 | 9 |
3 | 31 |
4 | 109 |
5 | 339 |
6 | 1039 |
7 | 2957 |
8 | 8135 |
9 | 21280 |
10 | 53688 |
11 | 130174 |
12 | 305539 |
13 | 693598 |
14 | 1528901 |
15 | 3274785 |
16 | 6832548 |
17 | 13900570 |
18 | 27626151 |
19 | 53692474 |
20 | 102193925 |
21 | 190678199 |
22 | 349172204 |
23 | 628122125 |
24 | 1111050987 |
25 | 1934048642 |
26 | 3315905471 |
27 | 5603441375 |
28 | 9339723645 |
29 | 15364504830 |
[1,2,9,31,109,339,1039,2957,8135,21280,53688, 130174,305539,693598,1528901,3274785,6832548, 13900570,27626151,53692474,102193925,190678199, 349172204,628122125,1111050987,1934048642, 3315905471,5603441375,9339723645,15364504830] |