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| n | a(n) |
|---|---|
| 0 | 3 |
| 1 | 11 |
| 2 | 51 |
| 3 | 251 |
| 4 | 1251 |
| 5 | 6251 |
| 6 | 31251 |
| 7 | 156251 |
| 8 | 781251 |
| 9 | 3906251 |
| 10 | 19531251 |
| 11 | 97656251 |
| 12 | 488281251 |
| 13 | 2441406251 |
| 14 | 12207031251 |
| 15 | 61035156251 |
| 16 | 305175781251 |
| 17 | 1525878906251 |
| 18 | 7629394531251 |
| 19 | 38146972656251 |
| 20 | 190734863281251 |
| 21 | 953674316406251 |
[3,11,51,251,1251,6251,31251,156251,781251, 3906251,19531251,97656251,488281251,2441406251, 12207031251,61035156251,305175781251, 1525878906251,7629394531251,38146972656251, 190734863281251,953674316406251] |