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| n | a(n) |
|---|---|
| 0 | 0 |
| 1 | 4 |
| 2 | 4 |
| 3 | 13 |
| 4 | 22 |
| 5 | 139 |
| 6 | 133 |
| 7 | 427 |
| 8 | 1111 |
| 9 | 1111 |
| 10 | 49999 |
| 11 | 40909 |
| 12 | 49999 |
| 13 | 69223 |
| 14 | 357142 |
| 15 | 1333333 |
| 16 | 3124993 |
| 17 | 4705294 |
| 18 | 11111111 |
| 19 | 31578421 |
| 20 | 499999999 |
| 21 | 238047619 |
| 22 | 409090909 |
| 23 | 2169565213 |
| 24 | 4166666662 |
| 25 | 31999999999 |
| 26 | 26923076923 |
| 27 | 37037037037 |
| 28 | 285713928571 |
| 29 | 344824137931 |
[0,4,4,13,22,139,133,427,1111,1111,49999,40909, 49999,69223,357142,1333333,3124993,4705294, 11111111,31578421,499999999,238047619,409090909, 2169565213,4166666662,31999999999,26923076923, 37037037037,285713928571,344824137931] |