n | a(n) |
---|---|
1 | 2 |
2 | 13 |
3 | 81 |
4 | 488 |
5 | 2929 |
6 | 17577 |
7 | 105464 |
8 | 632785 |
9 | 3796713 |
10 | 22780280 |
11 | 136681681 |
12 | 820090089 |
13 | 4920540536 |
14 | 29523243217 |
15 | 177139459305 |
16 | 1062836755832 |
17 | 6377020534993 |
18 | 38262123209961 |
19 | 229572739259768 |
20 | 1377436435558609 |
[2,13,81,488,2929,17577,105464,632785,3796713, 22780280,136681681,820090089,4920540536, 29523243217,177139459305,1062836755832, 6377020534993,38262123209961,229572739259768, 1377436435558609] |