n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 3 |
3 | 11 |
4 | 52 |
5 | 258 |
6 | 1344 |
7 | 7260 |
8 | 40290 |
9 | 228363 |
10 | 1316414 |
11 | 7694154 |
12 | 45491247 |
13 | 271594897 |
14 | 1635068538 |
15 | 9914851401 |
16 | 60503259435 |
17 | 371269891422 |
18 | 2289545742174 |
19 | 14181772631025 |
20 | 88194284530464 |
21 | 550444913949048 |
22 | 3446737067467311 |
23 | 21647081264988312 |
[1,1,3,11,52,258,1344,7260,40290,228363,1316414, 7694154,45491247,271594897,1635068538,9914851401, 60503259435,371269891422,2289545742174, 14181772631025,88194284530464,550444913949048, 3446737067467311,21647081264988312] |