n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 2 |
3 | 4 |
4 | 9 |
5 | 23 |
6 | 57 |
7 | 151 |
8 | 427 |
9 | 1263 |
10 | 3823 |
11 | 11724 |
12 | 36048 |
13 | 110953 |
14 | 342079 |
15 | 1064468 |
16 | 3341067 |
17 | 10583564 |
18 | 33727683 |
19 | 107931482 |
20 | 346615834 |
[1,1,2,4,9,23,57,151,427,1263,3823,11724,36048, 110953,342079,1064468,3341067,10583564,33727683, 107931482,346615834] |