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| n | a(n) |
|---|---|
| 1 | 0 |
| 2 | 1 |
| 3 | 12 |
| 4 | 52 |
| 5 | 150 |
| 6 | 345 |
| 7 | 686 |
| 8 | 1232 |
| 9 | 2052 |
| 10 | 3225 |
| 11 | 4840 |
| 12 | 6996 |
| 13 | 9802 |
| 14 | 13377 |
| 15 | 17850 |
| 16 | 23360 |
| 17 | 30056 |
| 18 | 38097 |
| 19 | 47652 |
| 20 | 58900 |
| 21 | 72030 |
| 22 | 87241 |
| 23 | 104742 |
| 24 | 124752 |
| 25 | 147500 |
| 26 | 173225 |
| 27 | 202176 |
| 28 | 234612 |
| 29 | 270802 |
| 30 | 311025 |
| 31 | 355570 |
| 32 | 404736 |
| 33 | 458832 |
| 34 | 518177 |
| 35 | 583100 |
| 36 | 653940 |
| 37 | 731046 |
| 38 | 814777 |
[0,1,12,52,150,345,686,1232,2052,3225,4840,6996, 9802,13377,17850,23360,30056,38097,47652,58900, 72030,87241,104742,124752,147500,173225,202176, 234612,270802,311025,355570,404736,458832,518177, 583100,653940,731046,814777] |