n | a(n) |
---|---|
0 | 0 |
1 | 1 |
2 | 21 |
3 | 751 |
4 | 38500 |
5 | 2617756 |
6 | 225629712 |
7 | 23924915568 |
8 | 3053853073152 |
9 | 461404969871616 |
10 | 81403191005875200 |
11 | 16580318776579814400 |
12 | 3861255442546368921600 |
13 | 1019529192596773592678400 |
[0,1,21,751,38500,2617756,225629712,23924915568, 3053853073152,461404969871616,81403191005875200, 16580318776579814400,3861255442546368921600, 1019529192596773592678400] |