n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 2 |
3 | 5 |
4 | 17 |
5 | 73 |
6 | 398 |
7 | 2636 |
8 | 20542 |
9 | 182750 |
10 | 1819148 |
11 | 19976248 |
12 | 239570876 |
13 | 3113794652 |
14 | 43590340840 |
15 | 653842358768 |
16 | 10461418047368 |
17 | 177843819947656 |
18 | 3201187351520912 |
19 | 60822552609266720 |
20 | 1216451015967652048 |
21 | 25545471145831066448 |
22 | 562000364198246159456 |
[1,1,2,5,17,73,398,2636,20542,182750,1819148, 19976248,239570876,3113794652,43590340840, 653842358768,10461418047368,177843819947656, 3201187351520912,60822552609266720, 1216451015967652048,25545471145831066448, 562000364198246159456] |