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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 2 |
| 2 | 3 |
| 3 | 4 |
| 4 | 6 |
| 5 | 10 |
| 6 | 16 |
| 7 | 25 |
| 8 | 43 |
| 9 | 73 |
| 10 | 133 |
| 11 | 241 |
| 12 | 457 |
| 13 | 865 |
| 14 | 1681 |
| 15 | 3265 |
| 16 | 6433 |
| 17 | 12673 |
| 18 | 25153 |
| 19 | 49921 |
| 20 | 99457 |
| 21 | 198145 |
| 22 | 395521 |
| 23 | 789505 |
| 24 | 1577473 |
| 25 | 3151873 |
| 26 | 6300673 |
| 27 | 12595201 |
| 28 | 25184257 |
| 29 | 50356225 |
| 30 | 100700161 |
[1,2,3,4,6,10,16,25,43,73,133,241,457,865,1681, 3265,6433,12673,25153,49921,99457,198145,395521, 789505,1577473,3151873,6300673,12595201,25184257, 50356225,100700161] |