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| n | a(n) |
|---|---|
| 1 | 0 |
| 2 | 3 |
| 3 | 36 |
| 4 | 135 |
| 5 | 360 |
| 6 | 798 |
| 7 | 1568 |
| 8 | 2826 |
| 9 | 4770 |
| 10 | 7645 |
| 11 | 11748 |
| 12 | 17433 |
| 13 | 25116 |
| 14 | 35280 |
| 15 | 48480 |
| 16 | 65348 |
| 17 | 86598 |
| 18 | 113031 |
| 19 | 145540 |
| 20 | 185115 |
| 21 | 232848 |
| 22 | 289938 |
| 23 | 357696 |
| 24 | 437550 |
| 25 | 531050 |
| 26 | 639873 |
| 27 | 765828 |
| 28 | 910861 |
| 29 | 1077060 |
| 30 | 1266660 |
| 31 | 1482048 |
| 32 | 1725768 |
| 33 | 2000526 |
| 34 | 2309195 |
| 35 | 2654820 |
| 36 | 3040623 |
[0,3,36,135,360,798,1568,2826,4770,7645,11748, 17433,25116,35280,48480,65348,86598,113031,145540, 185115,232848,289938,357696,437550,531050,639873, 765828,910861,1077060,1266660,1482048,1725768, 2000526,2309195,2654820,3040623] |