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| n | a(n) |
|---|---|
| 1 | 0 |
| 2 | 46 |
| 3 | 666 |
| 4 | 8242 |
| 5 | 117088 |
| 6 | 1674402 |
| 7 | 23732454 |
| 8 | 336380248 |
| 9 | 4770344900 |
| 10 | 67648850802 |
| 11 | 959306211222 |
| 12 | 13603641359640 |
| 13 | 192909619956550 |
| 14 | 2735599405114814 |
| 15 | 38792794983910750 |
| 16 | 550110139019848618 |
| 17 | 7800963216380203384 |
[0,46,666,8242,117088,1674402,23732454,336380248, 4770344900,67648850802,959306211222, 13603641359640,192909619956550,2735599405114814, 38792794983910750,550110139019848618, 7800963216380203384] |