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| n | a(n) |
|---|---|
| 1 | 3 |
| 2 | 15 |
| 3 | 30 |
| 4 | 51 |
| 5 | 78 |
| 6 | 111 |
| 7 | 150 |
| 8 | 195 |
| 9 | 246 |
| 10 | 303 |
| 11 | 366 |
| 12 | 435 |
| 13 | 510 |
| 14 | 591 |
| 15 | 678 |
| 16 | 771 |
| 17 | 870 |
| 18 | 975 |
| 19 | 1086 |
| 20 | 1203 |
| 21 | 1326 |
| 22 | 1455 |
| 23 | 1590 |
| 24 | 1731 |
| 25 | 1878 |
| 26 | 2031 |
| 27 | 2190 |
| 28 | 2355 |
| 29 | 2526 |
| 30 | 2703 |
| 31 | 2886 |
| 32 | 3075 |
| 33 | 3270 |
| 34 | 3471 |
| 35 | 3678 |
| 36 | 3891 |
| 37 | 4110 |
| 38 | 4335 |
| 39 | 4566 |
| 40 | 4803 |
| 41 | 5046 |
| 42 | 5295 |
| 43 | 5550 |
| 44 | 5811 |
| 45 | 6078 |
[3,15,30,51,78,111,150,195,246,303,366,435,510, 591,678,771,870,975,1086,1203,1326,1455,1590,1731, 1878,2031,2190,2355,2526,2703,2886,3075,3270,3471, 3678,3891,4110,4335,4566,4803,5046,5295,5550,5811, 6078] |