n | a(n) |
---|---|
0 | 0 |
1 | 1 |
2 | 3 |
3 | 15 |
4 | 63 |
5 | 279 |
6 | 1215 |
7 | 5319 |
8 | 23247 |
9 | 101655 |
10 | 444447 |
11 | 1943271 |
12 | 8496495 |
13 | 37149111 |
14 | 162426303 |
15 | 710173575 |
16 | 3105078543 |
17 | 13576277079 |
18 | 59359302495 |
19 | 259535569959 |
20 | 1134762524847 |
21 | 4961500994295 |
22 | 21693078131967 |
23 | 94848240361671 |
[0,1,3,15,63,279,1215,5319,23247,101655,444447, 1943271,8496495,37149111,162426303,710173575, 3105078543,13576277079,59359302495,259535569959, 1134762524847,4961500994295,21693078131967, 94848240361671] |