n | a(n) |
---|---|
0 | 1 |
1 | 2 |
2 | 6 |
3 | 32 |
4 | 250 |
5 | 2412 |
6 | 27524 |
7 | 360600 |
8 | 5296050 |
9 | 85805420 |
10 | 1515794467 |
11 | 28926900312 |
12 | 591903009295 |
13 | 12907255696636 |
14 | 298428274844730 |
15 | 7284351640977920 |
16 | 187013495992710210 |
17 | 5033669346061547724 |
18 | 141643700005223732471 |
[1,2,6,32,250,2412,27524,360600,5296050,85805420, 1515794467,28926900312,591903009295, 12907255696636,298428274844730,7284351640977920, 187013495992710210,5033669346061547724, 141643700005223732471] |