n | a(n) |
---|---|
0 | 0 |
1 | 2 |
2 | 576 |
3 | 17496 |
4 | 204800 |
5 | 1406250 |
6 | 6858432 |
7 | 26353376 |
8 | 84934656 |
9 | 239148450 |
10 | 605000000 |
11 | 1403076312 |
12 | 3027787776 |
13 | 6149354666 |
14 | 11859019200 |
15 | 21870000000 |
16 | 38788923392 |
17 | 66474865026 |
18 | 110505715776 |
19 | 178774347800 |
20 | 282240000000 |
[0,2,576,17496,204800,1406250,6858432,26353376, 84934656,239148450,605000000,1403076312, 3027787776,6149354666,11859019200,21870000000, 38788923392,66474865026,110505715776,178774347800, 282240000000] |