n | a(n) |
---|---|
1 | 1 |
2 | 5 |
3 | 27 |
4 | 138 |
5 | 691 |
6 | 3455 |
7 | 17277 |
8 | 86388 |
9 | 431941 |
10 | 2159705 |
11 | 10798527 |
12 | 53992638 |
13 | 269963191 |
14 | 1349815955 |
15 | 6749079777 |
16 | 33745398888 |
17 | 168726994441 |
18 | 843634972205 |
19 | 4218174861027 |
20 | 21090874305138 |
21 | 105454371525691 |
22 | 527271857628455 |
[1,5,27,138,691,3455,17277,86388,431941,2159705, 10798527,53992638,269963191,1349815955,6749079777, 33745398888,168726994441,843634972205, 4218174861027,21090874305138,105454371525691, 527271857628455] |