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| n | a(n) |
|---|---|
| 9 | 4 |
| 10 | 16 |
| 11 | 60 |
| 12 | 160 |
| 13 | 396 |
| 14 | 848 |
| 15 | 1716 |
| 16 | 3200 |
| 17 | 5720 |
| 18 | 9696 |
| 19 | 15912 |
| 20 | 25152 |
| 21 | 38760 |
| 22 | 58080 |
| 23 | 85272 |
| 24 | 122496 |
| 25 | 173052 |
| 26 | 240240 |
| 27 | 328900 |
| 28 | 443872 |
| 29 | 592020 |
| 30 | 780208 |
| 31 | 1017900 |
| 32 | 1314560 |
| 33 | 1682928 |
| 34 | 2135744 |
| 35 | 2689808 |
| 36 | 3361920 |
| 37 | 4173840 |
| 38 | 5147328 |
| 39 | 6310128 |
| 40 | 7689984 |
| 41 | 9321780 |
| 42 | 11240400 |
[4,16,60,160,396,848,1716,3200,5720,9696,15912, 25152,38760,58080,85272,122496,173052,240240, 328900,443872,592020,780208,1017900,1314560, 1682928,2135744,2689808,3361920,4173840,5147328, 6310128,7689984,9321780,11240400] |