n | a(n) |
---|---|
1 | 4 |
2 | 6 |
3 | 16 |
4 | 45 |
5 | 72 |
6 | 404 |
7 | 456 |
8 | 2550 |
9 | 5144 |
10 | 26880 |
11 | 38568 |
12 | 367170 |
13 | 431776 |
14 | 3202964 |
15 | 8993712 |
16 | 33857520 |
17 | 63177816 |
18 | 636456776 |
19 | 803796696 |
20 | 6886253964 |
21 | 17456593904 |
22 | 79965511980 |
23 | 139069427016 |
24 | 1466861335900 |
[4,6,16,45,72,404,456,2550,5144,26880,38568, 367170,431776,3202964,8993712,33857520,63177816, 636456776,803796696,6886253964,17456593904, 79965511980,139069427016,1466861335900] |