n | a(n) |
---|---|
1 | 1 |
2 | 2 |
3 | 5 |
4 | 21 |
5 | 114 |
6 | 780 |
7 | 6390 |
8 | 61110 |
9 | 667800 |
10 | 8210160 |
11 | 112152600 |
12 | 1685237400 |
13 | 27624920400 |
14 | 490572482400 |
15 | 9381882510000 |
16 | 192238348302000 |
17 | 4201639474032000 |
18 | 97572286427616000 |
19 | 2399151995223984000 |
20 | 62268748888378032000 |
21 | 1701213856860117600000 |
[1,2,5,21,114,780,6390,61110,667800,8210160, 112152600,1685237400,27624920400,490572482400, 9381882510000,192238348302000,4201639474032000, 97572286427616000,2399151995223984000, 62268748888378032000,1701213856860117600000] |