| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 0 |
| 2 | 0 |
| 3 | 0 |
| 4 | 1 |
| 5 | 1 |
| 6 | 1 |
| 7 | 1 |
| 8 | 2 |
| 9 | 4 |
| 10 | 5 |
| 11 | 6 |
| 12 | 8 |
| 13 | 13 |
| 14 | 19 |
| 15 | 26 |
| 16 | 36 |
| 17 | 51 |
| 18 | 74 |
| 19 | 105 |
| 20 | 148 |
| 21 | 208 |
| 22 | 296 |
| 23 | 421 |
| 24 | 597 |
| 25 | 846 |
| 26 | 1198 |
| 27 | 1699 |
| 28 | 2409 |
| 29 | 3417 |
| 30 | 4843 |
| 31 | 6865 |
| 32 | 9732 |
| 33 | 13799 |
| 34 | 19566 |
| 35 | 27739 |
| 36 | 39325 |
| 37 | 55749 |
| 38 | 79041 |
| 39 | 112063 |
| 40 | 158877 |
| 41 | 225241 |
| 42 | 319331 |
| 43 | 452734 |
| 44 | 641866 |
| 45 | 910001 |
| 46 | 1290137 |
| 47 | 1829079 |
| 48 | 2593169 |
| 49 | 3676457 |
| 50 | 5212266 |
[1,0,0,0,1,1,1,1,2,4,5,6,8,13,19,26,36,51,74,105, 148,208,296,421,597,846,1198,1699,2409,3417,4843, 6865,9732,13799,19566,27739,39325,55749,79041, 112063,158877,225241,319331,452734,641866,910001, 1290137,1829079,2593169,3676457,5212266] |