n | a(n) |
---|---|
1 | 1 |
2 | 7 |
3 | 50 |
4 | 350 |
5 | 2451 |
6 | 17157 |
7 | 120100 |
8 | 840700 |
9 | 5884901 |
10 | 41194307 |
11 | 288360150 |
12 | 2018521050 |
13 | 14129647351 |
14 | 98907531457 |
15 | 692352720200 |
16 | 4846469041400 |
17 | 33925283289801 |
18 | 237476983028607 |
19 | 1662338881200250 |
20 | 11636372168401750 |
21 | 81454605178812251 |
22 | 570182236251685757 |
23 | 3991275653761800300 |
[1,7,50,350,2451,17157,120100,840700,5884901, 41194307,288360150,2018521050,14129647351, 98907531457,692352720200,4846469041400, 33925283289801,237476983028607,1662338881200250, 11636372168401750,81454605178812251, 570182236251685757,3991275653761800300] |