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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 0 |
| 2 | 0 |
| 3 | 0 |
| 4 | 0 |
| 5 | 0 |
| 6 | 0 |
| 7 | 0 |
| 8 | 0 |
| 9 | 1 |
| 10 | 3 |
| 11 | 8 |
| 12 | 19 |
| 13 | 42 |
| 14 | 89 |
| 15 | 183 |
| 16 | 366 |
| 17 | 718 |
| 18 | 1385 |
| 19 | 2636 |
| 20 | 4961 |
| 21 | 9249 |
| 22 | 17105 |
| 23 | 31416 |
| 24 | 57356 |
| 25 | 104170 |
| 26 | 188331 |
| 27 | 339119 |
| 28 | 608464 |
| 29 | 1088286 |
| 30 | 1940994 |
| 31 | 3453084 |
| 32 | 6129207 |
| 33 | 10857097 |
| 34 | 19196490 |
| 35 | 33884792 |
| 36 | 59721438 |
| 37 | 105113418 |
| 38 | 184774518 |
| 39 | 324436647 |
| 40 | 569068543 |
| 41 | 997205614 |
| 42 | 1745923072 |
| 43 | 3054338540 |
| 44 | 5339361915 |
| 45 | 9327547185 |
| 46 | 16284517131 |
| 47 | 28414038840 |
| 48 | 49551994304 |
| 49 | 86372825386 |
| 50 | 150486363173 |
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