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| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 3 |
| 3 | 2 |
| 4 | 10 |
| 5 | 15 |
| 6 | 6 |
| 7 | 35 |
| 8 | 84 |
| 9 | 70 |
| 10 | 20 |
| 11 | 126 |
| 12 | 420 |
| 13 | 540 |
| 14 | 315 |
| 15 | 70 |
| 16 | 462 |
| 17 | 1980 |
| 18 | 3465 |
| 19 | 3080 |
| 20 | 1386 |
| 21 | 252 |
| 22 | 1716 |
| 23 | 9009 |
| 24 | 20020 |
| 25 | 24024 |
| 26 | 16380 |
| 27 | 6006 |
| 28 | 924 |
| 29 | 6435 |
| 30 | 40040 |
| 31 | 108108 |
| 32 | 163800 |
| 33 | 150150 |
| 34 | 83160 |
| 35 | 25740 |
| 36 | 3432 |
| 37 | 24310 |
| 38 | 175032 |
| 39 | 556920 |
| 40 | 1021020 |
| 41 | 1178100 |
| 42 | 875160 |
[1,3,2,10,15,6,35,84,70,20,126,420,540,315,70,462, 1980,3465,3080,1386,252,1716,9009,20020,24024, 16380,6006,924,6435,40040,108108,163800,150150, 83160,25740,3432,24310,175032,556920,1021020, 1178100,875160] |