n | a(n) |
---|---|
7 | 1 |
8 | 28 |
9 | 630 |
10 | 14070 |
11 | 331485 |
12 | 8411634 |
13 | 231354123 |
14 | 6899167275 |
15 | 222569372025 |
16 | 7741879425280 |
17 | 289297137120992 |
18 | 11570476164077376 |
19 | 493535471267193810 |
20 | 22376155441920000000 |
21 | 1074961750207964923710 |
22 | 54561107576767408522752 |
23 | 2918071167402563863036269 |
[1,28,630,14070,331485,8411634,231354123, 6899167275,222569372025,7741879425280, 289297137120992,11570476164077376, 493535471267193810,22376155441920000000, 1074961750207964923710,54561107576767408522752, 2918071167402563863036269] |