n | a(n) |
---|---|
1 | 31 |
2 | 129 |
3 | 533 |
4 | 2219 |
5 | 9227 |
6 | 38409 |
7 | 159845 |
8 | 665339 |
9 | 2769251 |
10 | 11526489 |
11 | 47976173 |
12 | 199690619 |
13 | 831166667 |
14 | 3459548649 |
15 | 14399597045 |
16 | 59935131419 |
17 | 249466635731 |
18 | 1038349453209 |
19 | 4321898626973 |
20 | 17988942330779 |
21 | 74874972302267 |
[31,129,533,2219,9227,38409,159845,665339,2769251, 11526489,47976173,199690619,831166667,3459548649, 14399597045,59935131419,249466635731, 1038349453209,4321898626973,17988942330779, 74874972302267] |