| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 0 |
| 2 | 1 |
| 3 | 3 |
| 4 | 7 |
| 5 | 13 |
| 6 | 28 |
| 7 | 52 |
| 8 | 107 |
| 9 | 203 |
| 10 | 396 |
| 11 | 741 |
| 12 | 1409 |
| 13 | 2596 |
| 14 | 4813 |
| 15 | 8777 |
| 16 | 15972 |
| 17 | 28737 |
| 18 | 51553 |
| 19 | 91644 |
| 20 | 162288 |
| 21 | 285377 |
| 22 | 499653 |
| 23 | 869758 |
| 24 | 1507615 |
| 25 | 2599974 |
| 26 | 4465606 |
| 27 | 7635607 |
| 28 | 13005252 |
| 29 | 22061424 |
| 30 | 37287395 |
| 31 | 62788012 |
| 32 | 105365891 |
| 33 | 176211393 |
| 34 | 293741195 |
| 35 | 488101711 |
| 36 | 808604106 |
[1,0,1,3,7,13,28,52,107,203,396,741,1409,2596, 4813,8777,15972,28737,51553,91644,162288,285377, 499653,869758,1507615,2599974,4465606,7635607, 13005252,22061424,37287395,62788012,105365891, 176211393,293741195,488101711,808604106] |