n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 1 |
3 | 4 |
4 | 13 |
5 | 76 |
6 | 421 |
7 | 3256 |
8 | 25369 |
9 | 245008 |
10 | 2449801 |
11 | 28441216 |
12 | 346065061 |
13 | 4700478784 |
14 | 67243537453 |
15 | 1047088053376 |
16 | 17192488230961 |
17 | 302112622479616 |
18 | 5593309059948049 |
19 | 109527844826856448 |
20 | 2255588021494237501 |
[1,1,1,4,13,76,421,3256,25369,245008,2449801, 28441216,346065061,4700478784,67243537453, 1047088053376,17192488230961,302112622479616, 5593309059948049,109527844826856448, 2255588021494237501] |