n | a(n) |
---|---|
1 | 13 |
2 | 74 |
3 | 331 |
4 | 1754 |
5 | 8829 |
6 | 46079 |
7 | 240222 |
8 | 1258853 |
9 | 6603593 |
10 | 34694809 |
11 | 182347026 |
12 | 958881035 |
13 | 5042935900 |
14 | 26526353359 |
15 | 139537750005 |
16 | 734056924930 |
17 | 3861673664333 |
18 | 20315559703409 |
19 | 106877200731477 |
20 | 562268273632807 |
[13,74,331,1754,8829,46079,240222,1258853,6603593, 34694809,182347026,958881035,5042935900, 26526353359,139537750005,734056924930, 3861673664333,20315559703409,106877200731477, 562268273632807] |