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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 24 |
| 2 | 324 |
| 3 | 3248 |
| 4 | 26802 |
| 5 | 191904 |
| 6 | 1230824 |
| 7 | 7221744 |
| 8 | 39342783 |
| 9 | 201199888 |
| 10 | 974039652 |
| 11 | 4493483424 |
| 12 | 19859122142 |
| 13 | 84451085664 |
| 14 | 346817307672 |
| 15 | 1379695128080 |
| 16 | 5330825817507 |
| 17 | 20050294307376 |
| 18 | 73556403409336 |
[1,24,324,3248,26802,191904,1230824,7221744, 39342783,201199888,974039652,4493483424, 19859122142,84451085664,346817307672, 1379695128080,5330825817507,20050294307376, 73556403409336] |