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| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 1 |
| 3 | 2 |
| 4 | 4 |
| 5 | 7 |
| 6 | 13 |
| 7 | 25 |
| 8 | 48 |
| 9 | 91 |
| 10 | 175 |
| 11 | 337 |
| 12 | 650 |
| 13 | 1258 |
| 14 | 2438 |
| 15 | 4735 |
| 16 | 9210 |
| 17 | 17940 |
| 18 | 34992 |
| 19 | 68331 |
| 20 | 133580 |
| 21 | 261391 |
| 22 | 511959 |
| 23 | 1003556 |
| 24 | 1968715 |
| 25 | 3864865 |
| 26 | 7592312 |
| 27 | 14923899 |
| 28 | 29352241 |
| 29 | 57761017 |
| 30 | 113723026 |
| 31 | 224010669 |
| 32 | 441452110 |
| 33 | 870326081 |
| 34 | 1716539232 |
[1,1,2,4,7,13,25,48,91,175,337,650,1258,2438,4735, 9210,17940,34992,68331,133580,261391,511959, 1003556,1968715,3864865,7592312,14923899,29352241, 57761017,113723026,224010669,441452110,870326081, 1716539232] |