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| n | a(n) |
|---|---|
| 1 | 540 |
| 2 | 800 |
| 3 | 1400 |
| 4 | 3072 |
| 5 | 8536 |
| 6 | 15888 |
| 7 | 44464 |
| 8 | 94416 |
| 9 | 273808 |
| 10 | 562320 |
| 11 | 1622320 |
| 12 | 3376272 |
| 13 | 9768496 |
| 14 | 20246928 |
| 15 | 58535344 |
| 16 | 121496976 |
| 17 | 351356848 |
| 18 | 728945040 |
| 19 | 2107845040 |
| 20 | 4373737872 |
| 21 | 12647655856 |
| 22 | 26242285968 |
| 23 | 75884757424 |
| 24 | 157453992336 |
[540,800,1400,3072,8536,15888,44464,94416,273808, 562320,1622320,3376272,9768496,20246928,58535344, 121496976,351356848,728945040,2107845040, 4373737872,12647655856,26242285968,75884757424, 157453992336] |