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| n | a(n) |
|---|---|
| 1 | 0 |
| 2 | 1 |
| 3 | 4 |
| 4 | 256 |
| 5 | 11664 |
| 6 | 262144 |
| 7 | 531441 |
| 8 | 11943936 |
| 9 | 156250000 |
| 10 | 544195584 |
| 11 | 4294967296 |
| 12 | 7119140625 |
| 13 | 24794911296 |
| 14 | 160000000000 |
| 15 | 195689447424 |
| 16 | 1129718145924 |
| 17 | 7290000000000 |
| 18 | 8916100448256 |
| 19 | 10851569165584 |
| 20 | 95367431640625 |
| 21 | 332150625000000 |
| 22 | 406239826673664 |
| 23 | 494424620106921 |
[0,1,4,256,11664,262144,531441,11943936,156250000, 544195584,4294967296,7119140625,24794911296, 160000000000,195689447424,1129718145924, 7290000000000,8916100448256,10851569165584, 95367431640625,332150625000000,406239826673664, 494424620106921] |