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| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 6 |
| 3 | 12 |
| 4 | 28 |
| 5 | 56 |
| 6 | 120 |
| 7 | 360 |
| 8 | 496 |
| 9 | 672 |
| 10 | 992 |
| 11 | 2016 |
| 12 | 8128 |
| 13 | 16256 |
| 14 | 30240 |
| 15 | 32760 |
| 16 | 60480 |
| 17 | 65520 |
| 18 | 120960 |
| 19 | 131040 |
| 20 | 523776 |
| 21 | 1571328 |
| 22 | 2178540 |
| 23 | 4357080 |
| 24 | 8714160 |
| 25 | 23569920 |
| 26 | 33550336 |
| 27 | 45532800 |
| 28 | 47139840 |
| 29 | 67100672 |
| 30 | 91065600 |
| 31 | 94279680 |
| 32 | 142990848 |
| 33 | 182131200 |
| 34 | 285981696 |
[1,6,12,28,56,120,360,496,672,992,2016,8128,16256, 30240,32760,60480,65520,120960,131040,523776, 1571328,2178540,4357080,8714160,23569920,33550336, 45532800,47139840,67100672,91065600,94279680, 142990848,182131200,285981696] |