n | a(n) |
---|---|
0 | 1 |
1 | 3 |
2 | 45 |
3 | 855 |
4 | 17955 |
5 | 398601 |
6 | 9167823 |
7 | 216098685 |
8 | 5186368440 |
9 | 126201632040 |
10 | 3104560148184 |
11 | 77049538223112 |
12 | 1926238455577800 |
13 | 48452305767226200 |
14 | 1225151160114148200 |
15 | 31118839466899364280 |
16 | 793530406405933789140 |
17 | 20305042752151835192700 |
[1,3,45,855,17955,398601,9167823,216098685, 5186368440,126201632040,3104560148184, 77049538223112,1926238455577800,48452305767226200, 1225151160114148200,31118839466899364280, 793530406405933789140,20305042752151835192700] |