n | a(n) |
---|---|
0 | 1 |
1 | 2 |
2 | 5 |
3 | 12 |
4 | 31 |
5 | 80 |
6 | 196 |
7 | 486 |
8 | 1171 |
9 | 2787 |
10 | 6564 |
11 | 15323 |
12 | 35403 |
13 | 81251 |
14 | 185087 |
15 | 418918 |
16 | 942525 |
17 | 2109143 |
18 | 4695648 |
19 | 10405694 |
20 | 22959156 |
[1,2,5,12,31,80,196,486,1171,2787,6564,15323, 35403,81251,185087,418918,942525,2109143,4695648, 10405694,22959156] |