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| n | a(n) |
|---|---|
| 1 | 15 |
| 2 | 21 |
| 3 | 51 |
| 4 | 99 |
| 5 | 249 |
| 6 | 309 |
| 7 | 339 |
| 8 | 441 |
| 9 | 615 |
| 10 | 1065 |
| 11 | 1071 |
| 12 | 1275 |
| 13 | 1311 |
| 14 | 1461 |
| 15 | 1665 |
| 16 | 1719 |
| 17 | 1935 |
| 18 | 2445 |
| 19 | 2451 |
| 20 | 2499 |
| 21 | 2511 |
| 22 | 2781 |
| 23 | 2829 |
| 24 | 2949 |
| 25 | 3015 |
| 26 | 3129 |
| 27 | 3435 |
| 28 | 3759 |
| 29 | 3789 |
| 30 | 3795 |
| 31 | 3819 |
| 32 | 3939 |
| 33 | 4161 |
| 34 | 4221 |
| 35 | 4761 |
| 36 | 4809 |
| 37 | 5709 |
| 38 | 5721 |
| 39 | 6291 |
| 40 | 6555 |
| 41 | 6699 |
| 42 | 6855 |
| 43 | 6921 |
| 44 | 7071 |
[15,21,51,99,249,309,339,441,615,1065,1071,1275, 1311,1461,1665,1719,1935,2445,2451,2499,2511,2781, 2829,2949,3015,3129,3435,3759,3789,3795,3819,3939, 4161,4221,4761,4809,5709,5721,6291,6555,6699,6855, 6921,7071] |