n | a(n) |
---|---|
1 | 21 |
2 | 271 |
3 | 2731 |
4 | 23351 |
5 | 176851 |
6 | 1225631 |
7 | 8006491 |
8 | 50556551 |
9 | 313882531 |
10 | 1932641711 |
11 | 11839990891 |
12 | 72260648471 |
13 | 439667406451 |
14 | 2668522016831 |
15 | 16163719991611 |
16 | 97745259402791 |
17 | 590286253682371 |
18 | 3560791008422351 |
19 | 21460113482174731 |
[21,271,2731,23351,176851,1225631,8006491, 50556551,313882531,1932641711,11839990891, 72260648471,439667406451,2668522016831, 16163719991611,97745259402791,590286253682371, 3560791008422351,21460113482174731] |