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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 0 |
| 2 | 0 |
| 3 | 0 |
| 4 | 0 |
| 5 | 1 |
| 6 | 1 |
| 7 | 1 |
| 8 | 1 |
| 9 | 1 |
| 10 | 6 |
| 11 | 12 |
| 12 | 19 |
| 13 | 27 |
| 14 | 36 |
| 15 | 81 |
| 16 | 177 |
| 17 | 341 |
| 18 | 592 |
| 19 | 951 |
| 20 | 1726 |
| 21 | 3417 |
| 22 | 6766 |
| 23 | 12812 |
| 24 | 22951 |
| 25 | 41531 |
| 26 | 78222 |
| 27 | 151291 |
| 28 | 291957 |
| 29 | 550015 |
| 30 | 1024683 |
| 31 | 1924543 |
| 32 | 3671017 |
| 33 | 7063893 |
| 34 | 13532120 |
| 35 | 25730347 |
| 36 | 48840523 |
| 37 | 93154161 |
| 38 | 178806493 |
| 39 | 343926597 |
| 40 | 660308308 |
| 41 | 1265195467 |
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