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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 4 |
| 2 | 49 |
| 3 | 676 |
| 4 | 13225 |
| 5 | 293764 |
| 6 | 7890481 |
| 7 | 236359876 |
| 8 | 8052729169 |
| 9 | 300797402500 |
| 10 | 12388985000401 |
| 11 | 551925653637604 |
| 12 | 26614517015830969 |
| 13 | 1373655853915667716 |
| 14 | 75803216516463190225 |
| 15 | 4440662493517062816004 |
| 16 | 275697752917311709134241 |
| 17 | 18052104090118575573856516 |
[1,4,49,676,13225,293764,7890481,236359876, 8052729169,300797402500,12388985000401, 551925653637604,26614517015830969, 1373655853915667716,75803216516463190225, 4440662493517062816004,275697752917311709134241, 18052104090118575573856516] |