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| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 6 |
| 3 | 27 |
| 4 | 56 |
| 5 | 165 |
| 6 | 156 |
| 7 | 413 |
| 8 | 480 |
| 9 | 1179 |
| 10 | 880 |
| 11 | 1925 |
| 12 | 1908 |
| 13 | 2977 |
| 14 | 2380 |
| 15 | 5955 |
| 16 | 4608 |
| 17 | 6681 |
| 18 | 6300 |
| 19 | 9709 |
| 20 | 9400 |
| 21 | 17703 |
| 22 | 9416 |
| 23 | 18285 |
| 24 | 18264 |
| 25 | 27325 |
| 26 | 16016 |
| 27 | 37935 |
| 28 | 26404 |
| 29 | 35061 |
| 30 | 32640 |
| 31 | 43741 |
| 32 | 42848 |
| 33 | 70125 |
| 34 | 35938 |
| 35 | 79205 |
| 36 | 61992 |
| 37 | 75073 |
| 38 | 51756 |
| 39 | 119925 |
| 40 | 88600 |
[1,6,27,56,165,156,413,480,1179,880,1925,1908, 2977,2380,5955,4608,6681,6300,9709,9400,17703, 9416,18285,18264,27325,16016,37935,26404,35061, 32640,43741,42848,70125,35938,79205,61992,75073, 51756,119925,88600] |