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| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 3 |
| 3 | 6 |
| 4 | 36 |
| 5 | 105 |
| 6 | 120 |
| 7 | 780 |
| 8 | 210 |
| 9 | 990 |
| 10 | 630 |
| 11 | 19110 |
| 12 | 7140 |
| 13 | 5460 |
| 14 | 176715 |
| 15 | 25200 |
| 16 | 73920 |
| 17 | 103740 |
| 18 | 145530 |
| 19 | 97020 |
| 20 | 157080 |
| 21 | 4744740 |
| 22 | 2386020 |
| 23 | 1185030 |
| 24 | 2031120 |
| 25 | 3483480 |
| 26 | 13857480 |
| 27 | 8817900 |
| 28 | 118572300 |
| 29 | 88438350 |
| 30 | 39209940 |
| 31 | 286071240 |
| 32 | 2162160 |
| 33 | 472612140 |
| 34 | 953993040 |
| 35 | 668883600 |
[1,3,6,36,105,120,780,210,990,630,19110,7140,5460, 176715,25200,73920,103740,145530,97020,157080, 4744740,2386020,1185030,2031120,3483480,13857480, 8817900,118572300,88438350,39209940,286071240, 2162160,472612140,953993040,668883600] |