n | a(n) |
---|---|
1 | 2 |
2 | 4 |
3 | 13 |
4 | 34 |
5 | 118 |
6 | 419 |
7 | 1481 |
8 | 5394 |
9 | 19848 |
10 | 73880 |
11 | 277222 |
12 | 1047495 |
13 | 3977615 |
14 | 15169751 |
15 | 58074521 |
16 | 223081286 |
17 | 859450114 |
18 | 3319751314 |
19 | 12852496680 |
20 | 49860496892 |
21 | 193783946748 |
22 | 754379484650 |
23 | 2941051327294 |
24 | 11481400024511 |
25 | 44875877924939 |
[2,4,13,34,118,419,1481,5394,19848,73880,277222, 1047495,3977615,15169751,58074521,223081286, 859450114,3319751314,12852496680,49860496892, 193783946748,754379484650,2941051327294, 11481400024511,44875877924939] |