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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 1984 |
| 2 | 575424 |
| 3 | 58115328 |
| 4 | 2724906944 |
| 5 | 69079796864 |
| 6 | 1054968628480 |
| 7 | 10706472186368 |
| 8 | 79395777333184 |
| 9 | 464573878394560 |
| 10 | 2256126097001600 |
| 11 | 9423431444080384 |
| 12 | 34759556728866048 |
| 13 | 115474354635222656 |
| 14 | 350982387781513728 |
| 15 | 987881573708613120 |
| 16 | 2601123015997179840 |
| 17 | 6457558989366956928 |
[1,1984,575424,58115328,2724906944,69079796864, 1054968628480,10706472186368,79395777333184, 464573878394560,2256126097001600,9423431444080384, 34759556728866048,115474354635222656, 350982387781513728,987881573708613120, 2601123015997179840,6457558989366956928] |