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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 1 |
| 2 | 6 |
| 3 | 20 |
| 4 | 60 |
| 5 | 60 |
| 6 | 210 |
| 7 | 420 |
| 8 | 420 |
| 9 | 210 |
| 10 | 1512 |
| 11 | 2520 |
| 12 | 2520 |
| 13 | 1512 |
| 14 | 504 |
| 15 | 9240 |
| 16 | 13860 |
| 17 | 13860 |
| 18 | 9240 |
| 19 | 3960 |
| 20 | 990 |
| 21 | 51480 |
| 22 | 72072 |
| 23 | 72072 |
| 24 | 51480 |
| 25 | 25740 |
| 26 | 8580 |
| 27 | 1716 |
| 28 | 270270 |
| 29 | 360360 |
| 30 | 360360 |
| 31 | 270270 |
| 32 | 150150 |
| 33 | 60060 |
| 34 | 16380 |
| 35 | 2730 |
| 36 | 1361360 |
| 37 | 1750320 |
| 38 | 1750320 |
| 39 | 1361360 |
| 40 | 816816 |
| 41 | 371280 |
| 42 | 123760 |
| 43 | 28560 |
| 44 | 4080 |
[1,1,6,20,60,60,210,420,420,210,1512,2520,2520, 1512,504,9240,13860,13860,9240,3960,990,51480, 72072,72072,51480,25740,8580,1716,270270,360360, 360360,270270,150150,60060,16380,2730,1361360, 1750320,1750320,1361360,816816,371280,123760, 28560,4080] |