n | a(n) |
---|---|
0 | 0 |
1 | 1 |
2 | 3 |
3 | 5 |
4 | 16 |
5 | 31 |
6 | 105 |
7 | 218 |
8 | 770 |
9 | 1673 |
10 | 6096 |
11 | 13672 |
12 | 51027 |
13 | 117194 |
14 | 445787 |
15 | 1042970 |
16 | 4028922 |
17 | 9567393 |
18 | 37432324 |
19 | 89984282 |
20 | 355854272 |
[0,1,3,5,16,31,105,218,770,1673,6096,13672,51027, 117194,445787,1042970,4028922,9567393,37432324, 89984282,355854272] |