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| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 4 |
| 3 | 24 |
| 4 | 48 |
| 5 | 480 |
| 6 | 960 |
| 7 | 13440 |
| 8 | 26880 |
| 9 | 161280 |
| 10 | 322560 |
| 11 | 7096320 |
| 12 | 14192640 |
| 13 | 369008640 |
| 14 | 738017280 |
| 15 | 1476034560 |
| 16 | 2952069120 |
| 17 | 100370350080 |
| 18 | 200740700160 |
| 19 | 7628146606080 |
| 20 | 15256293212160 |
| 21 | 30512586424320 |
| 22 | 61025172848640 |
| 23 | 2807157951037440 |
| 24 | 5614315902074880 |
| 25 | 56143159020748800 |
[1,4,24,48,480,960,13440,26880,161280,322560, 7096320,14192640,369008640,738017280,1476034560, 2952069120,100370350080,200740700160, 7628146606080,15256293212160,30512586424320, 61025172848640,2807157951037440,5614315902074880, 56143159020748800] |