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| n | a(n) |
|---|---|
| 1 | 3 |
| 2 | 13 |
| 3 | 49 |
| 4 | 185 |
| 5 | 713 |
| 6 | 2793 |
| 7 | 11049 |
| 8 | 43945 |
| 9 | 175273 |
| 10 | 700073 |
| 11 | 2798249 |
| 12 | 11188905 |
| 13 | 44747433 |
| 14 | 178973353 |
| 15 | 715860649 |
| 16 | 2863377065 |
| 17 | 11453377193 |
| 18 | 45813246633 |
| 19 | 183252462249 |
| 20 | 733008800425 |
| 21 | 2932033104553 |
| 22 | 11728128223913 |
| 23 | 46912504507049 |
| 24 | 187650001250985 |
| 25 | 750599971449513 |
| 26 | 3002399818689193 |
| 27 | 12009599140539049 |
[3,13,49,185,713,2793,11049,43945,175273,700073, 2798249,11188905,44747433,178973353,715860649, 2863377065,11453377193,45813246633,183252462249, 733008800425,2932033104553,11728128223913, 46912504507049,187650001250985,750599971449513, 3002399818689193,12009599140539049] |