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| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 1 |
| 3 | 1 |
| 4 | 6 |
| 5 | 3 |
| 6 | 1 |
| 7 | 15 |
| 8 | 45 |
| 9 | 15 |
| 10 | 1 |
| 11 | 28 |
| 12 | 210 |
| 13 | 420 |
| 14 | 105 |
| 15 | 1 |
| 16 | 45 |
| 17 | 630 |
| 18 | 3150 |
| 19 | 4725 |
| 20 | 945 |
| 21 | 1 |
| 22 | 66 |
| 23 | 1485 |
| 24 | 13860 |
| 25 | 51975 |
| 26 | 62370 |
| 27 | 10395 |
| 28 | 1 |
| 29 | 91 |
| 30 | 3003 |
| 31 | 45045 |
| 32 | 315315 |
| 33 | 945945 |
| 34 | 945945 |
| 35 | 135135 |
| 36 | 1 |
| 37 | 120 |
| 38 | 5460 |
| 39 | 120120 |
| 40 | 1351350 |
| 41 | 7567560 |
| 42 | 18918900 |
| 43 | 16216200 |
| 44 | 2027025 |
| 45 | 1 |
| 46 | 153 |
| 47 | 9180 |
[1,1,1,6,3,1,15,45,15,1,28,210,420,105,1,45,630, 3150,4725,945,1,66,1485,13860,51975,62370,10395,1, 91,3003,45045,315315,945945,945945,135135,1,120, 5460,120120,1351350,7567560,18918900,16216200, 2027025,1,153,9180] |