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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 3 |
| 2 | 5 |
| 3 | 10 |
| 4 | 19 |
| 5 | 40 |
| 6 | 83 |
| 7 | 173 |
| 8 | 361 |
| 9 | 754 |
| 10 | 1574 |
| 11 | 3286 |
| 12 | 6859 |
| 13 | 14321 |
| 14 | 29898 |
| 15 | 62421 |
| 16 | 130321 |
| 17 | 272084 |
| 18 | 568057 |
| 19 | 1185987 |
| 20 | 2476099 |
| 21 | 5169594 |
| 22 | 10793066 |
| 23 | 22533737 |
| 24 | 47045881 |
| 25 | 98222279 |
| 26 | 205068241 |
| 27 | 428140988 |
| 28 | 893871739 |
[1,3,5,10,19,40,83,173,361,754,1574,3286,6859, 14321,29898,62421,130321,272084,568057,1185987, 2476099,5169594,10793066,22533737,47045881, 98222279,205068241,428140988,893871739] |