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| n | a(n) |
|---|---|
| 1 | 0 |
| 2 | 60 |
| 3 | 216 |
| 4 | 468 |
| 5 | 816 |
| 6 | 1260 |
| 7 | 1800 |
| 8 | 2436 |
| 9 | 3168 |
| 10 | 3996 |
| 11 | 4920 |
| 12 | 5940 |
| 13 | 7056 |
| 14 | 8268 |
| 15 | 9576 |
| 16 | 10980 |
| 17 | 12480 |
| 18 | 14076 |
| 19 | 15768 |
| 20 | 17556 |
| 21 | 19440 |
| 22 | 21420 |
| 23 | 23496 |
| 24 | 25668 |
| 25 | 27936 |
| 26 | 30300 |
| 27 | 32760 |
| 28 | 35316 |
| 29 | 37968 |
| 30 | 40716 |
| 31 | 43560 |
| 32 | 46500 |
| 33 | 49536 |
| 34 | 52668 |
| 35 | 55896 |
| 36 | 59220 |
| 37 | 62640 |
| 38 | 66156 |
| 39 | 69768 |
| 40 | 73476 |
[0,60,216,468,816,1260,1800,2436,3168,3996,4920, 5940,7056,8268,9576,10980,12480,14076,15768,17556, 19440,21420,23496,25668,27936,30300,32760,35316, 37968,40716,43560,46500,49536,52668,55896,59220, 62640,66156,69768,73476] |