n | a(n) |
---|---|
0 | 0 |
1 | 1 |
2 | 4 |
3 | 21 |
4 | 148 |
5 | 1333 |
6 | 14664 |
7 | 190633 |
8 | 2859496 |
9 | 48611433 |
10 | 923617228 |
11 | 19395961789 |
12 | 446107121148 |
13 | 11152678028701 |
14 | 301122306774928 |
15 | 8732546896472913 |
16 | 270708953790660304 |
17 | 8933395475091790033 |
18 | 312668841628212651156 |
19 | 11568747140243868092773 |
[0,1,4,21,148,1333,14664,190633,2859496,48611433, 923617228,19395961789,446107121148,11152678028701, 301122306774928,8732546896472913, 270708953790660304,8933395475091790033, 312668841628212651156,11568747140243868092773] |