n | a(n) |
---|---|
1 | 1 |
2 | 5 |
3 | 30 |
4 | 160 |
5 | 850 |
6 | 4520 |
7 | 24040 |
8 | 127860 |
9 | 680040 |
10 | 3616880 |
11 | 19236840 |
12 | 102313600 |
13 | 544168000 |
14 | 2894227280 |
15 | 15393318880 |
16 | 81871340160 |
17 | 435443220000 |
18 | 2315960597120 |
19 | 12317733383040 |
20 | 65513444349760 |
21 | 348441653760640 |
22 | 1853231611930880 |
23 | 9856649945242240 |
24 | 52423856531251200 |
[1,5,30,160,850,4520,24040,127860,680040,3616880, 19236840,102313600,544168000,2894227280, 15393318880,81871340160,435443220000, 2315960597120,12317733383040,65513444349760, 348441653760640,1853231611930880,9856649945242240, 52423856531251200] |