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| n | a(n) |
|---|---|
| 1 | 21 |
| 2 | 51 |
| 3 | 93 |
| 4 | 147 |
| 5 | 213 |
| 6 | 291 |
| 7 | 381 |
| 8 | 483 |
| 9 | 597 |
| 10 | 723 |
| 11 | 861 |
| 12 | 1011 |
| 13 | 1173 |
| 14 | 1347 |
| 15 | 1533 |
| 16 | 1731 |
| 17 | 1941 |
| 18 | 2163 |
| 19 | 2397 |
| 20 | 2643 |
| 21 | 2901 |
| 22 | 3171 |
| 23 | 3453 |
| 24 | 3747 |
| 25 | 4053 |
| 26 | 4371 |
| 27 | 4701 |
| 28 | 5043 |
| 29 | 5397 |
| 30 | 5763 |
| 31 | 6141 |
| 32 | 6531 |
| 33 | 6933 |
| 34 | 7347 |
| 35 | 7773 |
| 36 | 8211 |
| 37 | 8661 |
| 38 | 9123 |
| 39 | 9597 |
| 40 | 10083 |
| 41 | 10581 |
| 42 | 11091 |
| 43 | 11613 |
| 44 | 12147 |
[21,51,93,147,213,291,381,483,597,723,861,1011, 1173,1347,1533,1731,1941,2163,2397,2643,2901,3171, 3453,3747,4053,4371,4701,5043,5397,5763,6141,6531, 6933,7347,7773,8211,8661,9123,9597,10083,10581, 11091,11613,12147] |