n | a(n) |
---|---|
0 | 1 |
1 | 3 |
2 | 12 |
3 | 53 |
4 | 231 |
5 | 1000 |
6 | 4329 |
7 | 18747 |
8 | 81188 |
9 | 351597 |
10 | 1522639 |
11 | 6594000 |
12 | 28556241 |
13 | 123666803 |
14 | 535556412 |
15 | 2319302053 |
16 | 10044062391 |
17 | 43497219000 |
18 | 188370799289 |
19 | 815766130347 |
20 | 3532789487188 |
21 | 15299239691997 |
[1,3,12,53,231,1000,4329,18747,81188,351597, 1522639,6594000,28556241,123666803,535556412, 2319302053,10044062391,43497219000,188370799289, 815766130347,3532789487188,15299239691997] |