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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 3 |
| 2 | 2 |
| 3 | 5 |
| 4 | 4 |
| 5 | 10 |
| 6 | 9 |
| 7 | 21 |
| 8 | 26 |
| 9 | 48 |
| 10 | 70 |
| 11 | 136 |
| 12 | 209 |
| 13 | 389 |
| 14 | 673 |
| 15 | 1235 |
| 16 | 2221 |
| 17 | 4144 |
| 18 | 7631 |
| 19 | 14358 |
| 20 | 26941 |
| 21 | 51016 |
| 22 | 96783 |
| 23 | 184560 |
| 24 | 352454 |
| 25 | 675391 |
| 26 | 1296503 |
| 27 | 2494071 |
| 28 | 4805389 |
| 29 | 9273501 |
| 30 | 17919559 |
| 31 | 34670835 |
| 32 | 67156871 |
| 33 | 130218219 |
| 34 | 252741267 |
| 35 | 490988734 |
[1,3,2,5,4,10,9,21,26,48,70,136,209,389,673,1235, 2221,4144,7631,14358,26941,51016,96783,184560, 352454,675391,1296503,2494071,4805389,9273501, 17919559,34670835,67156871,130218219,252741267, 490988734] |