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| n | a(n) |
|---|---|
| 1 | 2 |
| 2 | 7 |
| 3 | 15 |
| 4 | 31 |
| 5 | 51 |
| 6 | 83 |
| 7 | 119 |
| 8 | 171 |
| 9 | 231 |
| 10 | 307 |
| 11 | 395 |
| 12 | 503 |
| 13 | 627 |
| 14 | 755 |
| 15 | 919 |
| 16 | 1079 |
| 17 | 1271 |
| 18 | 1483 |
| 19 | 1703 |
| 20 | 1967 |
| 21 | 2215 |
| 22 | 2495 |
| 23 | 2795 |
| 24 | 3127 |
| 25 | 3479 |
| 26 | 3839 |
| 27 | 4267 |
| 28 | 4647 |
| 29 | 5059 |
| 30 | 5539 |
| 31 | 5991 |
| 32 | 6511 |
| 33 | 7063 |
| 34 | 7651 |
| 35 | 8211 |
| 36 | 8855 |
| 37 | 9439 |
| 38 | 10139 |
| 39 | 10887 |
| 40 | 11611 |
| 41 | 12371 |
| 42 | 13159 |
| 43 | 13951 |
| 44 | 14715 |
| 45 | 15647 |
| 46 | 16591 |
| 47 | 17431 |
| 48 | 18487 |
| 49 | 19419 |
| 50 | 20415 |
| 51 | 21491 |
[2,7,15,31,51,83,119,171,231,307,395,503,627,755, 919,1079,1271,1483,1703,1967,2215,2495,2795,3127, 3479,3839,4267,4647,5059,5539,5991,6511,7063,7651, 8211,8855,9439,10139,10887,11611,12371,13159, 13951,14715,15647,16591,17431,18487,19419,20415, 21491] |