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| n | a(n) |
|---|---|
| 0 | 0 |
| 1 | 0 |
| 2 | 0 |
| 3 | 6 |
| 4 | 26 |
| 5 | 75 |
| 6 | 174 |
| 7 | 350 |
| 8 | 636 |
| 9 | 1071 |
| 10 | 1700 |
| 11 | 2574 |
| 12 | 3750 |
| 13 | 5291 |
| 14 | 7266 |
| 15 | 9750 |
| 16 | 12824 |
| 17 | 16575 |
| 18 | 21096 |
| 19 | 26486 |
| 20 | 32850 |
| 21 | 40299 |
| 22 | 48950 |
| 23 | 58926 |
| 24 | 70356 |
| 25 | 83375 |
| 26 | 98124 |
| 27 | 114750 |
| 28 | 133406 |
| 29 | 154251 |
| 30 | 177450 |
| 31 | 203174 |
| 32 | 231600 |
| 33 | 262911 |
| 34 | 297296 |
| 35 | 334950 |
| 36 | 376074 |
| 37 | 420875 |
| 38 | 469566 |
| 39 | 522366 |
[0,0,0,6,26,75,174,350,636,1071,1700,2574,3750, 5291,7266,9750,12824,16575,21096,26486,32850, 40299,48950,58926,70356,83375,98124,114750,133406, 154251,177450,203174,231600,262911,297296,334950, 376074,420875,469566,522366] |