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| n | a(n) |
|---|---|
| 1 | 21 |
| 2 | 30 |
| 3 | 902406 |
| 4 | 959721 |
| 5 | 6040059046 |
| 6 | 6242406405 |
| 7 | 9842410005 |
| 8 | 9900249006 |
| 9 | 15033519988494 |
| 10 | 17250863148969 |
| 11 | 22499666270469 |
| 12 | 27632040031654 |
| 13 | 34182546327286 |
| 14 | 37487353123861 |
| 15 | 52213551379230 |
| 16 | 74230108225630 |
[21,30,902406,959721,6040059046,6242406405, 9842410005,9900249006,15033519988494, 17250863148969,22499666270469,27632040031654, 34182546327286,37487353123861,52213551379230, 74230108225630] |