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| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 3 |
| 3 | 1 |
| 4 | 21 |
| 5 | 9 |
| 6 | 1 |
| 7 | 231 |
| 8 | 111 |
| 9 | 18 |
| 10 | 1 |
| 11 | 3465 |
| 12 | 1785 |
| 13 | 345 |
| 14 | 30 |
| 15 | 1 |
| 16 | 65835 |
| 17 | 35595 |
| 18 | 7650 |
| 19 | 825 |
| 20 | 45 |
| 21 | 1 |
| 22 | 1514205 |
| 23 | 848925 |
| 24 | 196245 |
| 25 | 24150 |
| 26 | 1680 |
| 27 | 63 |
| 28 | 1 |
| 29 | 40883535 |
| 30 | 23586255 |
| 31 | 5755050 |
| 32 | 775845 |
| 33 | 62790 |
| 34 | 3066 |
| 35 | 84 |
| 36 | 1 |
| 37 | 1267389585 |
| 38 | 748471185 |
| 39 | 190482705 |
| 40 | 27478710 |
[1,3,1,21,9,1,231,111,18,1,3465,1785,345,30,1, 65835,35595,7650,825,45,1,1514205,848925,196245, 24150,1680,63,1,40883535,23586255,5755050,775845, 62790,3066,84,1,1267389585,748471185,190482705, 27478710] |