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| n | a(n) |
|---|---|
| 0 | 0 |
| 1 | 3 |
| 2 | 18 |
| 3 | 45 |
| 4 | 84 |
| 5 | 135 |
| 6 | 198 |
| 7 | 273 |
| 8 | 360 |
| 9 | 459 |
| 10 | 570 |
| 11 | 693 |
| 12 | 828 |
| 13 | 975 |
| 14 | 1134 |
| 15 | 1305 |
| 16 | 1488 |
| 17 | 1683 |
| 18 | 1890 |
| 19 | 2109 |
| 20 | 2340 |
| 21 | 2583 |
| 22 | 2838 |
| 23 | 3105 |
| 24 | 3384 |
| 25 | 3675 |
| 26 | 3978 |
| 27 | 4293 |
| 28 | 4620 |
| 29 | 4959 |
| 30 | 5310 |
| 31 | 5673 |
| 32 | 6048 |
| 33 | 6435 |
| 34 | 6834 |
| 35 | 7245 |
| 36 | 7668 |
| 37 | 8103 |
| 38 | 8550 |
| 39 | 9009 |
| 40 | 9480 |
| 41 | 9963 |
| 42 | 10458 |
| 43 | 10965 |
| 44 | 11484 |
[0,3,18,45,84,135,198,273,360,459,570,693,828,975, 1134,1305,1488,1683,1890,2109,2340,2583,2838,3105, 3384,3675,3978,4293,4620,4959,5310,5673,6048,6435, 6834,7245,7668,8103,8550,9009,9480,9963,10458, 10965,11484] |