n | a(n) |
---|---|
0 | 0 |
1 | 1 |
2 | 2 |
3 | 15 |
4 | 112 |
5 | 1285 |
6 | 17616 |
7 | 299299 |
8 | 5946368 |
9 | 136497897 |
10 | 3544641280 |
11 | 102858065431 |
12 | 3297199331328 |
13 | 115730076038317 |
14 | 4414151526557696 |
15 | 181797547951527915 |
16 | 8040649885153755136 |
17 | 380100842138029431121 |
18 | 19125314442962053300224 |
19 | 1020539634854353310016415 |
20 | 57563650890815727219507200 |
[0,1,2,15,112,1285,17616,299299,5946368,136497897, 3544641280,102858065431,3297199331328, 115730076038317,4414151526557696, 181797547951527915,8040649885153755136, 380100842138029431121,19125314442962053300224, 1020539634854353310016415, 57563650890815727219507200] |