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| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 1 |
| 3 | 2 |
| 4 | 5 |
| 5 | 9 |
| 6 | 15 |
| 7 | 25 |
| 8 | 48 |
| 9 | 99 |
| 10 | 187 |
| 11 | 326 |
| 12 | 543 |
| 13 | 896 |
| 14 | 1497 |
| 15 | 2568 |
| 16 | 4554 |
| 17 | 8504 |
| 18 | 17074 |
| 19 | 36011 |
| 20 | 75842 |
| 21 | 153964 |
| 22 | 298835 |
| 23 | 561337 |
| 24 | 1044317 |
| 25 | 1968266 |
| 26 | 3796589 |
| 27 | 7448571 |
| 28 | 14648620 |
| 29 | 28541211 |
| 30 | 54900185 |
| 31 | 104612044 |
| 32 | 198620706 |
| 33 | 377264405 |
| 34 | 717303565 |
| 35 | 1363083731 |
| 36 | 2585928327 |
[1,1,2,5,9,15,25,48,99,187,326,543,896,1497,2568, 4554,8504,17074,36011,75842,153964,298835,561337, 1044317,1968266,3796589,7448571,14648620,28541211, 54900185,104612044,198620706,377264405,717303565, 1363083731,2585928327] |