n | a(n) |
---|---|
1 | 2 |
2 | 14 |
3 | 86 |
4 | 518 |
5 | 3110 |
6 | 18662 |
7 | 111974 |
8 | 671846 |
9 | 4031078 |
10 | 24186470 |
11 | 145118822 |
12 | 870712934 |
13 | 5224277606 |
14 | 31345665638 |
15 | 188073993830 |
16 | 1128443962982 |
17 | 6770663777894 |
18 | 40623982667366 |
19 | 243743896004198 |
20 | 1462463376025190 |
[2,14,86,518,3110,18662,111974,671846,4031078, 24186470,145118822,870712934,5224277606, 31345665638,188073993830,1128443962982, 6770663777894,40623982667366,243743896004198, 1462463376025190] |