n | a(n) |
---|---|
0 | 0 |
1 | 1 |
2 | 1 |
3 | 4 |
4 | 19 |
5 | 116 |
6 | 871 |
7 | 7764 |
8 | 80179 |
9 | 941812 |
10 | 12403711 |
11 | 181056404 |
12 | 2901669739 |
13 | 50656307508 |
14 | 956922611191 |
15 | 19449063226324 |
16 | 423206168046499 |
17 | 9816562636678004 |
18 | 241805428075379311 |
19 | 6303793707327637524 |
20 | 173401707643671303259 |
[0,1,1,4,19,116,871,7764,80179,941812,12403711, 181056404,2901669739,50656307508,956922611191, 19449063226324,423206168046499,9816562636678004, 241805428075379311,6303793707327637524, 173401707643671303259] |