n | a(n) |
---|---|
2 | 1 |
3 | 8 |
4 | 44 |
5 | 215 |
6 | 1028 |
7 | 5040 |
8 | 25931 |
9 | 141394 |
10 | 818940 |
11 | 5030489 |
12 | 32670830 |
13 | 223561960 |
14 | 1606504121 |
15 | 12086613500 |
16 | 94951417768 |
17 | 777028092855 |
18 | 6609770035768 |
19 | 58333927746852 |
20 | 533203742855027 |
21 | 5039919479205198 |
22 | 49191925330095240 |
[1,8,44,215,1028,5040,25931,141394,818940,5030489, 32670830,223561960,1606504121,12086613500, 94951417768,777028092855,6609770035768, 58333927746852,533203742855027,5039919479205198, 49191925330095240] |