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| n | a(n) |
|---|---|
| 1 | 31 |
| 2 | 139 |
| 3 | 571 |
| 4 | 1291 |
| 5 | 1759 |
| 6 | 5179 |
| 7 | 6079 |
| 8 | 10399 |
| 9 | 17419 |
| 10 | 20731 |
| 11 | 28219 |
| 12 | 30271 |
| 13 | 34591 |
| 14 | 39199 |
| 15 | 41611 |
| 16 | 49279 |
| 17 | 54751 |
| 18 | 63499 |
| 19 | 69691 |
| 20 | 82939 |
| 21 | 101119 |
| 22 | 104971 |
| 23 | 116959 |
| 24 | 125311 |
| 25 | 147451 |
| 26 | 161599 |
| 27 | 186619 |
| 28 | 207931 |
| 29 | 219019 |
| 30 | 242059 |
| 31 | 247999 |
| 32 | 285151 |
| 33 | 311359 |
[31,139,571,1291,1759,5179,6079,10399,17419,20731, 28219,30271,34591,39199,41611,49279,54751,63499, 69691,82939,101119,104971,116959,125311,147451, 161599,186619,207931,219019,242059,247999,285151, 311359] |