n | a(n) |
---|---|
1 | 1 |
2 | 3 |
3 | 24 |
4 | 232 |
5 | 2232 |
6 | 20880 |
7 | 190656 |
8 | 1707264 |
9 | 15046272 |
10 | 130854656 |
11 | 1125285888 |
12 | 9583835136 |
13 | 80941029376 |
14 | 678574706688 |
15 | 5651894845440 |
16 | 46802046418944 |
17 | 385539453517824 |
18 | 3161014415327232 |
19 | 25806384396763136 |
20 | 209862489033670656 |
[1,3,24,232,2232,20880,190656,1707264,15046272, 130854656,1125285888,9583835136,80941029376, 678574706688,5651894845440,46802046418944, 385539453517824,3161014415327232, 25806384396763136,209862489033670656] |