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| n | a(n) |
|---|---|
| 1 | 0 |
| 2 | 0 |
| 3 | 0 |
| 4 | 0 |
| 5 | 1 |
| 6 | 0 |
| 7 | 4 |
| 8 | 0 |
| 9 | 19 |
| 10 | 1 |
| 11 | 73 |
| 12 | 4 |
| 13 | 283 |
| 14 | 25 |
| 15 | 1090 |
| 16 | 106 |
| 17 | 4183 |
| 18 | 463 |
| 19 | 16105 |
| 20 | 1892 |
| 21 | 62170 |
| 22 | 7752 |
| 23 | 240907 |
| 24 | 31212 |
| 25 | 936447 |
| 26 | 125609 |
| 27 | 3651618 |
| 28 | 503165 |
| 29 | 14277519 |
| 30 | 2014826 |
| 31 | 55961118 |
| 32 | 8058790 |
| 33 | 219813564 |
| 34 | 32231897 |
| 35 | 865091976 |
| 36 | 128897247 |
| 37 | 3410498446 |
| 38 | 515554767 |
| 39 | 13466262587 |
| 40 | 2062445063 |
| 41 | 53245595410 |
| 42 | 8252868076 |
| 43 | 210800433323 |
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