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| n | a(n) |
|---|---|
| 1 | 0 |
| 2 | 7 |
| 3 | 7 |
| 4 | 84 |
| 5 | 900 |
| 6 | 84 |
| 7 | 756 |
| 8 | 36312 |
| 9 | 36312 |
| 10 | 756 |
| 11 | 6048 |
| 12 | 1213836 |
| 13 | 5695536 |
| 14 | 1213836 |
| 15 | 6048 |
| 16 | 45360 |
| 17 | 36926640 |
| 18 | 755009274 |
| 19 | 755009274 |
| 20 | 36926640 |
| 21 | 45360 |
| 22 | 326592 |
| 23 | 1064495604 |
| 24 | 91506078732 |
| 25 | 399002850360 |
| 26 | 91506078732 |
| 27 | 1064495604 |
| 28 | 326592 |
| 29 | 2286144 |
[0,7,7,84,900,84,756,36312,36312,756,6048,1213836, 5695536,1213836,6048,45360,36926640,755009274, 755009274,36926640,45360,326592,1064495604, 91506078732,399002850360,91506078732,1064495604, 326592,2286144] |