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| n | a(n) |
|---|---|
| 1 | 239 |
| 2 | 1871 |
| 3 | 390959 |
| 4 | 839519 |
| 5 | 5622479 |
| 6 | 10256399 |
| 7 | 14639039 |
| 8 | 60453359 |
| 9 | 142374959 |
| 10 | 188226719 |
| 11 | 423474479 |
| 12 | 1119903119 |
| 13 | 7965713519 |
| 14 | 9788425919 |
| 15 | 16180741439 |
| 16 | 22110152399 |
| 17 | 28064855519 |
| 18 | 28793774879 |
| 19 | 36010838159 |
| 20 | 43494981839 |
| 21 | 44506450799 |
[239,1871,390959,839519,5622479,10256399,14639039, 60453359,142374959,188226719,423474479,1119903119, 7965713519,9788425919,16180741439,22110152399, 28064855519,28793774879,36010838159,43494981839, 44506450799] |