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| n | a(n) |
|---|---|
| 1 | 0 |
| 2 | 0 |
| 3 | 0 |
| 4 | 0 |
| 5 | 0 |
| 6 | 0 |
| 7 | 0 |
| 8 | 0 |
| 9 | 0 |
| 10 | 0 |
| 11 | 0 |
| 12 | 0 |
| 13 | 0 |
| 14 | 0 |
| 15 | 0 |
| 16 | 0 |
| 17 | 0 |
| 18 | 0 |
| 19 | 0 |
| 20 | 0 |
| 21 | 0 |
| 22 | 0 |
| 23 | 0 |
| 24 | 0 |
| 25 | 0 |
| 26 | 0 |
| 27 | 0 |
| 28 | 1 |
| 29 | 2 |
| 30 | 8 |
| 31 | 21 |
| 32 | 48 |
| 33 | 107 |
| 34 | 233 |
| 35 | 477 |
| 36 | 965 |
| 37 | 1908 |
| 38 | 3726 |
| 39 | 7191 |
| 40 | 13850 |
| 41 | 26553 |
| 42 | 51219 |
| 43 | 99393 |
| 44 | 195289 |
| 45 | 389344 |
| 46 | 790821 |
| 47 | 1636517 |
| 48 | 3453698 |
| 49 | 7417316 |
| 50 | 16176919 |
| 51 | 35708318 |
| 52 | 79529997 |
[0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, 0,0,0,1,2,8,21,48,107,233,477,965,1908,3726,7191, 13850,26553,51219,99393,195289,389344,790821, 1636517,3453698,7417316,16176919,35708318, 79529997] |