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| n | a(n) |
|---|---|
| 1 | 4 |
| 2 | 10 |
| 3 | 10 |
| 4 | 24 |
| 5 | 76 |
| 6 | 24 |
| 7 | 70 |
| 8 | 700 |
| 9 | 700 |
| 10 | 70 |
| 11 | 208 |
| 12 | 8296 |
| 13 | 29184 |
| 14 | 8296 |
| 15 | 208 |
| 16 | 700 |
| 17 | 104968 |
| 18 | 1398500 |
| 19 | 1398500 |
| 20 | 104968 |
| 21 | 700 |
| 22 | 2344 |
| 23 | 1399176 |
| 24 | 71582944 |
| 25 | 268447936 |
| 26 | 71582944 |
| 27 | 1399176 |
| 28 | 2344 |
| 29 | 8230 |
| 30 | 19175140 |
| 31 | 3817765120 |
| 32 | 54975633976 |
| 33 | 54975633976 |
[4,10,10,24,76,24,70,700,700,70,208,8296,29184, 8296,208,700,104968,1398500,1398500,104968,700, 2344,1399176,71582944,268447936,71582944,1399176, 2344,8230,19175140,3817765120,54975633976, 54975633976] |