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| n | a(n) |
|---|---|
| 3 | 1 |
| 4 | 6 |
| 5 | 150 |
| 6 | 13500 |
| 7 | 4063500 |
| 8 | 3925341000 |
| 9 | 11874156525000 |
| 10 | 110785880378250000 |
| 11 | 3157508376660503250000 |
| 12 | 273206569798926704209500000 |
| 13 | 71477668823644198988810437500000 |
| 14 | 56393736371790563676201770874375000000 |
| 15 | 133940819650376139577910502205498936875000000 |
| 16 | 956563276525616170757609342853980880495071250000000 |
[1,6,150,13500,4063500,3925341000,11874156525000, 110785880378250000,3157508376660503250000, 273206569798926704209500000, 71477668823644198988810437500000, 56393736371790563676201770874375000000, 133940819650376139577910502205498936875000000, 95656327652561617075760934285398088049507125000000\ 0] |