The OEIS is supported by the many generous donors to the OEIS Foundation.
| n | a(n) |
|---|---|
| 1 | 1728 |
| 2 | 7776 |
| 3 | 34992 |
| 4 | 157464 |
| 5 | 466560 |
| 6 | 1382400 |
| 7 | 4096000 |
| 8 | 9600000 |
| 9 | 22500000 |
| 10 | 52734375 |
| 11 | 106312500 |
| 12 | 214326000 |
| 13 | 432081216 |
| 14 | 784147392 |
| 15 | 1423082304 |
| 16 | 2582630848 |
| 17 | 4337012736 |
| 18 | 7283146752 |
| 19 | 12230590464 |
| 20 | 19349176320 |
| 21 | 30611001600 |
| 22 | 48427561125 |
[1728,7776,34992,157464,466560,1382400,4096000, 9600000,22500000,52734375,106312500,214326000, 432081216,784147392,1423082304,2582630848, 4337012736,7283146752,12230590464,19349176320, 30611001600,48427561125] |