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| n | a(n) |
|---|---|
| 0 | 0 |
| 1 | 432 |
| 2 | 27648 |
| 3 | 314928 |
| 4 | 1769472 |
| 5 | 6750000 |
| 6 | 20155392 |
| 7 | 50824368 |
| 8 | 113246208 |
| 9 | 229582512 |
| 10 | 432000000 |
| 11 | 765314352 |
| 12 | 1289945088 |
| 13 | 2085181488 |
| 14 | 3252759552 |
| 15 | 4920750000 |
| 16 | 7247757312 |
| 17 | 10427429808 |
| 18 | 14693280768 |
| 19 | 20323820592 |
| 20 | 27648000000 |
| 21 | 37050964272 |
| 22 | 48980118528 |
[0,432,27648,314928,1769472,6750000,20155392, 50824368,113246208,229582512,432000000,765314352, 1289945088,2085181488,3252759552,4920750000, 7247757312,10427429808,14693280768,20323820592, 27648000000,37050964272,48980118528] |