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| n | a(n) |
|---|---|
| 1 | 11 |
| 2 | 31 |
| 3 | 87 |
| 4 | 245 |
| 5 | 689 |
| 6 | 1939 |
| 7 | 5455 |
| 8 | 15349 |
| 9 | 43185 |
| 10 | 121507 |
| 11 | 341871 |
| 12 | 961893 |
| 13 | 2706385 |
| 14 | 7614707 |
| 15 | 21424783 |
| 16 | 60280917 |
| 17 | 169606769 |
| 18 | 477206723 |
| 19 | 1342671919 |
| 20 | 3777750469 |
| 21 | 10629103249 |
| 22 | 29906114067 |
| 23 | 84144036943 |
| 24 | 236748209589 |
| 25 | 666116301873 |
[11,31,87,245,689,1939,5455,15349,43185,121507, 341871,961893,2706385,7614707,21424783,60280917, 169606769,477206723,1342671919,3777750469, 10629103249,29906114067,84144036943,236748209589, 666116301873] |