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| n | a(n) |
|---|---|
| 1 | 12 |
| 2 | 2918 |
| 3 | 64576 |
| 4 | 673943 |
| 5 | 4058656 |
| 6 | 19462319 |
| 7 | 70636336 |
| 8 | 224091378 |
| 9 | 621046332 |
| 10 | 1573877652 |
| 11 | 3582064304 |
| 12 | 3582064304 |
| 13 | 15781332296 |
[12,2918,64576,673943,4058656,19462319,70636336, 224091378,621046332,1573877652,3582064304, 3582064304,15781332296] |