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| n | a(n) |
|---|---|
| 1 | 7 |
| 2 | 43 |
| 3 | 235 |
| 4 | 1171 |
| 5 | 5467 |
| 6 | 24403 |
| 7 | 105595 |
| 8 | 447091 |
| 9 | 1864027 |
| 10 | 7686163 |
| 11 | 31440955 |
| 12 | 127865011 |
| 13 | 517788187 |
| 14 | 2090186323 |
| 15 | 8417944315 |
| 16 | 33843570931 |
| 17 | 135890057947 |
| 18 | 545108340883 |
| 19 | 2185079263675 |
| 20 | 8754257900851 |
| 21 | 35058860433307 |
| 22 | 140360940805843 |
| 23 | 561820285607035 |
[7,43,235,1171,5467,24403,105595,447091,1864027, 7686163,31440955,127865011,517788187,2090186323, 8417944315,33843570931,135890057947,545108340883, 2185079263675,8754257900851,35058860433307, 140360940805843,561820285607035] |