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| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 4 |
| 3 | 9 |
| 4 | 16 |
| 5 | 81 |
| 6 | 10000 |
| 7 | 640000 |
| 8 | 7290000 |
| 9 | 40960000 |
| 10 | 156250000 |
| 11 | 188210961 |
| 12 | 466560000 |
| 13 | 1176490000 |
| 14 | 2621440000 |
| 15 | 5314410000 |
| 16 | 10000000000 |
| 17 | 17715610000 |
| 18 | 29859840000 |
| 19 | 48268090000 |
| 20 | 75295360000 |
| 21 | 113906250000 |
| 22 | 167772160000 |
| 23 | 241375690000 |
| 24 | 340122240000 |
| 25 | 470458810000 |
[1,4,9,16,81,10000,640000,7290000,40960000, 156250000,188210961,466560000,1176490000, 2621440000,5314410000,10000000000,17715610000, 29859840000,48268090000,75295360000,113906250000, 167772160000,241375690000,340122240000, 470458810000] |