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| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 3 |
| 3 | 9 |
| 4 | 19 |
| 5 | 37 |
| 6 | 73 |
| 7 | 144 |
| 8 | 283 |
| 9 | 556 |
| 10 | 1093 |
| 11 | 2149 |
| 12 | 4225 |
| 13 | 8306 |
| 14 | 16329 |
| 15 | 32102 |
| 16 | 63111 |
| 17 | 124073 |
| 18 | 243921 |
| 19 | 479536 |
| 20 | 942743 |
| 21 | 1853384 |
| 22 | 3643657 |
| 23 | 7163241 |
| 24 | 14082561 |
| 25 | 27685586 |
| 26 | 54428429 |
| 27 | 107003474 |
| 28 | 210363291 |
| 29 | 413563341 |
| 30 | 813044121 |
| 31 | 1598402656 |
| 32 | 3142376883 |
| 33 | 6177750292 |
| 34 | 12145137293 |
[1,3,9,19,37,73,144,283,556,1093,2149,4225,8306, 16329,32102,63111,124073,243921,479536,942743, 1853384,3643657,7163241,14082561,27685586, 54428429,107003474,210363291,413563341,813044121, 1598402656,3142376883,6177750292,12145137293] |