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| n | a(n) |
|---|---|
| 2 | 1 |
| 3 | 1 |
| 4 | 3 |
| 5 | 1 |
| 6 | 11 |
| 7 | 13 |
| 8 | 13 |
| 9 | 29 |
| 10 | 43 |
| 11 | 61 |
| 12 | 79 |
| 13 | 107 |
| 14 | 181 |
| 15 | 251 |
| 16 | 359 |
| 17 | 509 |
| 18 | 719 |
| 19 | 1021 |
| 20 | 1447 |
| 21 | 2039 |
| 22 | 2887 |
| 23 | 4093 |
| 24 | 5717 |
| 25 | 8179 |
| 26 | 11579 |
[1,1,3,1,11,13,13,29,43,61,79,107,181,251,359,509, 719,1021,1447,2039,2887,4093,5717,8179,11579] |