n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 3 |
3 | 20 |
4 | 94 |
5 | 854 |
6 | 7638 |
7 | 77678 |
8 | 823184 |
9 | 11711952 |
10 | 162710640 |
11 | 2405290392 |
12 | 40661618688 |
13 | 701353671264 |
14 | 13592382983424 |
15 | 280431464804640 |
16 | 5835146351362560 |
17 | 130171240155651840 |
18 | 3168997587241864704 |
19 | 77082927941097660672 |
20 | 2037627154674197591040 |
21 | 56017463733173686947840 |
[1,1,3,20,94,854,7638,77678,823184,11711952, 162710640,2405290392,40661618688,701353671264, 13592382983424,280431464804640,5835146351362560, 130171240155651840,3168997587241864704, 77082927941097660672,2037627154674197591040, 56017463733173686947840] |