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| n | a(n) |
|---|---|
| 0 | 0 |
| 1 | 15 |
| 2 | 54 |
| 3 | 117 |
| 4 | 204 |
| 5 | 315 |
| 6 | 450 |
| 7 | 609 |
| 8 | 792 |
| 9 | 999 |
| 10 | 1230 |
| 11 | 1485 |
| 12 | 1764 |
| 13 | 2067 |
| 14 | 2394 |
| 15 | 2745 |
| 16 | 3120 |
| 17 | 3519 |
| 18 | 3942 |
| 19 | 4389 |
| 20 | 4860 |
| 21 | 5355 |
| 22 | 5874 |
| 23 | 6417 |
| 24 | 6984 |
| 25 | 7575 |
| 26 | 8190 |
| 27 | 8829 |
| 28 | 9492 |
| 29 | 10179 |
| 30 | 10890 |
| 31 | 11625 |
| 32 | 12384 |
| 33 | 13167 |
| 34 | 13974 |
| 35 | 14805 |
| 36 | 15660 |
| 37 | 16539 |
| 38 | 17442 |
| 39 | 18369 |
| 40 | 19320 |
| 41 | 20295 |
| 42 | 21294 |
| 43 | 22317 |
[0,15,54,117,204,315,450,609,792,999,1230,1485, 1764,2067,2394,2745,3120,3519,3942,4389,4860,5355, 5874,6417,6984,7575,8190,8829,9492,10179,10890, 11625,12384,13167,13974,14805,15660,16539,17442, 18369,19320,20295,21294,22317] |