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| n | a(n) |
|---|---|
| 1 | 7 |
| 2 | 83 |
| 3 | 1253 |
| 4 | 19503 |
| 5 | 302121 |
| 6 | 4670875 |
| 7 | 72212345 |
| 8 | 1116538567 |
| 9 | 17264116873 |
| 10 | 266940042371 |
| 11 | 4127456101305 |
| 12 | 63819175744751 |
| 13 | 986779131942921 |
| 14 | 15257688013347083 |
| 15 | 235916058283574201 |
| 16 | 3647760162012484183 |
[7,83,1253,19503,302121,4670875,72212345, 1116538567,17264116873,266940042371,4127456101305, 63819175744751,986779131942921,15257688013347083, 235916058283574201,3647760162012484183] |