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| n | a(n) |
|---|---|
| 0 | 16 |
| 1 | 28561 |
| 2 | 331776 |
| 3 | 1500625 |
| 4 | 4477456 |
| 5 | 10556001 |
| 6 | 21381376 |
| 7 | 38950081 |
| 8 | 65610000 |
| 9 | 104060401 |
| 10 | 157351936 |
| 11 | 228886641 |
| 12 | 322417936 |
| 13 | 442050625 |
| 14 | 592240896 |
| 15 | 777796321 |
| 16 | 1003875856 |
| 17 | 1275989841 |
| 18 | 1600000000 |
| 19 | 1982119441 |
[16,28561,331776,1500625,4477456,10556001, 21381376,38950081,65610000,104060401,157351936, 228886641,322417936,442050625,592240896,777796321, 1003875856,1275989841,1600000000,1982119441] |