n | a(n) |
---|---|
1 | 2 |
2 | 2 |
3 | 8 |
4 | 46 |
5 | 276 |
6 | 1836 |
7 | 12712 |
8 | 90610 |
9 | 661652 |
10 | 4922404 |
11 | 37178736 |
12 | 284330552 |
13 | 2197474456 |
14 | 17136206984 |
15 | 134667604360 |
16 | 1065457242054 |
17 | 8479671583004 |
18 | 67841927540372 |
19 | 545314544677904 |
20 | 4401667141277988 |
[2,2,8,46,276,1836,12712,90610,661652,4922404, 37178736,284330552,2197474456,17136206984, 134667604360,1065457242054,8479671583004, 67841927540372,545314544677904,4401667141277988] |