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| n | a(n) |
|---|---|
| 1 | 16 |
| 2 | 419 |
| 3 | 7517 |
| 4 | 103511 |
| 5 | 1295953 |
| 6 | 15474787 |
| 7 | 179390821 |
| 8 | 2037968761 |
| 9 | 22801415981 |
| 10 | 252096675073 |
| 11 | 2760723662941 |
| 12 | 29996212395727 |
| 13 | 323780470283789 |
| 14 | 3475385632514321 |
| 15 | 37124507635789309 |
| 16 | 394906912575042053 |
| 17 | 4185296577158764117 |
| 18 | 44211790220874464021 |
[16,419,7517,103511,1295953,15474787,179390821, 2037968761,22801415981,252096675073,2760723662941, 29996212395727,323780470283789,3475385632514321, 37124507635789309,394906912575042053, 4185296577158764117,44211790220874464021] |