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| n | a(n) |
|---|---|
| 0 | 0 |
| 1 | 0 |
| 2 | 0 |
| 3 | 0 |
| 4 | 1 |
| 5 | 4 |
| 6 | 8 |
| 7 | 15 |
| 8 | 24 |
| 9 | 36 |
| 10 | 51 |
| 11 | 70 |
| 12 | 94 |
| 13 | 122 |
| 14 | 156 |
| 15 | 195 |
| 16 | 240 |
| 17 | 291 |
| 18 | 349 |
| 19 | 415 |
| 20 | 488 |
| 21 | 570 |
| 22 | 660 |
| 23 | 759 |
| 24 | 867 |
| 25 | 985 |
| 26 | 1114 |
| 27 | 1253 |
| 28 | 1404 |
| 29 | 1566 |
| 30 | 1740 |
| 31 | 1926 |
| 32 | 2125 |
| 33 | 2338 |
| 34 | 2564 |
| 35 | 2805 |
| 36 | 3060 |
| 37 | 3330 |
| 38 | 3615 |
| 39 | 3916 |
| 40 | 4234 |
| 41 | 4568 |
| 42 | 4920 |
| 43 | 5289 |
| 44 | 5676 |
| 45 | 6081 |
| 46 | 6505 |
| 47 | 6949 |
| 48 | 7412 |
| 49 | 7896 |
[0,0,0,0,1,4,8,15,24,36,51,70,94,122,156,195,240, 291,349,415,488,570,660,759,867,985,1114,1253, 1404,1566,1740,1926,2125,2338,2564,2805,3060,3330, 3615,3916,4234,4568,4920,5289,5676,6081,6505,6949, 7412,7896] |