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| n | a(n) |
|---|---|
| 1 | 6 |
| 2 | 16 |
| 3 | 116 |
| 4 | 241 |
| 5 | 242 |
| 6 | 491 |
| 7 | 991 |
| 8 | 2491 |
| 9 | 3331 |
| 10 | 14966 |
| 11 | 15556 |
| 12 | 62491 |
| 13 | 78116 |
| 14 | 83331 |
| 15 | 249991 |
| 16 | 264866 |
| 17 | 546841 |
| 18 | 1109366 |
| 19 | 2265491 |
| 20 | 4999861 |
| 21 | 4999991 |
| 22 | 5837041 |
| 23 | 12499996 |
| 24 | 25249861 |
| 25 | 26011861 |
| 26 | 36249091 |
| 27 | 80070866 |
| 28 | 190999991 |
| 29 | 242090611 |
| 30 | 365038621 |
| 31 | 976562241 |
| 32 | 1210466866 |
| 33 | 1830622801 |
[6,16,116,241,242,491,991,2491,3331,14966,15556, 62491,78116,83331,249991,264866,546841,1109366, 2265491,4999861,4999991,5837041,12499996,25249861, 26011861,36249091,80070866,190999991,242090611, 365038621,976562241,1210466866,1830622801] |