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| n | a(n) |
|---|---|
| 1 | 487 |
| 2 | 6921 |
| 3 | 86509 |
| 4 | 919222 |
| 5 | 8638740 |
| 6 | 73276865 |
| 7 | 573836909 |
| 8 | 4209526173 |
| 9 | 29315012106 |
| 10 | 195567636675 |
| 11 | 1260793028680 |
| 12 | 7902333022413 |
| 13 | 48450753346164 |
| 14 | 291857672487975 |
| 15 | 1735081638204069 |
| 16 | 10213231916866375 |
| 17 | 59720608313178454 |
| 18 | 347726532976693642 |
[487,6921,86509,919222,8638740,73276865,573836909, 4209526173,29315012106,195567636675,1260793028680, 7902333022413,48450753346164,291857672487975, 1735081638204069,10213231916866375, 59720608313178454,347726532976693642] |