n | a(n) |
---|---|
3 | 1 |
4 | 6 |
5 | 18 |
6 | 93 |
7 | 600 |
8 | 4320 |
9 | 35168 |
10 | 321630 |
11 | 3257109 |
12 | 36199458 |
13 | 438126986 |
14 | 5736774869 |
15 | 80808984725 |
16 | 1218563192160 |
17 | 19587031966352 |
18 | 334329804180135 |
19 | 6039535339644630 |
20 | 115118210695441900 |
21 | 2308967760171049528 |
22 | 48613722701440862328 |
23 | 1072008447320752890459 |
[1,6,18,93,600,4320,35168,321630,3257109,36199458, 438126986,5736774869,80808984725,1218563192160, 19587031966352,334329804180135,6039535339644630, 115118210695441900,2308967760171049528, 48613722701440862328,1072008447320752890459] |