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| n | a(n) |
|---|---|
| 1 | 672 |
| 2 | 7840 |
| 3 | 7840 |
| 4 | 95872 |
| 5 | 141728 |
| 6 | 95872 |
| 7 | 1200640 |
| 8 | 2765648 |
| 9 | 2765648 |
| 10 | 1200640 |
| 11 | 15217152 |
| 12 | 56172656 |
| 13 | 87871120 |
| 14 | 56172656 |
| 15 | 15217152 |
| 16 | 194145280 |
| 17 | 1165600828 |
| 18 | 2941603932 |
| 19 | 2941603932 |
| 20 | 1165600828 |
| 21 | 194145280 |
| 22 | 2484815872 |
| 23 | 24484032192 |
[672,7840,7840,95872,141728,95872,1200640,2765648, 2765648,1200640,15217152,56172656,87871120, 56172656,15217152,194145280,1165600828,2941603932, 2941603932,1165600828,194145280,2484815872, 24484032192] |