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| n | a(n) |
|---|---|
| 1 | 0 |
| 2 | 0 |
| 3 | 1 |
| 4 | 4 |
| 5 | 12 |
| 6 | 27 |
| 7 | 52 |
| 8 | 91 |
| 9 | 147 |
| 10 | 225 |
| 11 | 331 |
| 12 | 469 |
| 13 | 645 |
| 14 | 867 |
| 15 | 1141 |
| 16 | 1474 |
| 17 | 1875 |
| 18 | 2352 |
| 19 | 2914 |
| 20 | 3571 |
| 21 | 4332 |
| 22 | 5208 |
| 23 | 6211 |
| 24 | 7351 |
| 25 | 8640 |
| 26 | 10092 |
| 27 | 11719 |
| 28 | 13534 |
| 29 | 15552 |
| 30 | 17787 |
| 31 | 20254 |
| 32 | 22969 |
| 33 | 25947 |
| 34 | 29205 |
| 35 | 32761 |
| 36 | 36631 |
| 37 | 40833 |
| 38 | 45387 |
| 39 | 50311 |
| 40 | 55624 |
[0,0,1,4,12,27,52,91,147,225,331,469,645,867,1141, 1474,1875,2352,2914,3571,4332,5208,6211,7351,8640, 10092,11719,13534,15552,17787,20254,22969,25947, 29205,32761,36631,40833,45387,50311,55624] |