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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 0 |
| 2 | 6 |
| 3 | 0 |
| 4 | 39168 |
| 5 | 1357824 |
| 6 | 27443718 |
| 7 | 291096576 |
| 8 | -11867773434 |
| 9 | -909632040960 |
| 10 | -33941504512512 |
| 11 | -822014874550272 |
| 12 | -7737982685551872 |
| 13 | 465460035666923520 |
| 14 | 32929573125536994828 |
| 15 | 1241615351428411410432 |
| 16 | 30133833989484059781120 |
| 17 | 241406030006869666848768 |
[1,0,6,0,39168,1357824,27443718,291096576, -11867773434,-909632040960,-33941504512512, -822014874550272,-7737982685551872, 465460035666923520,32929573125536994828, 1241615351428411410432,30133833989484059781120, 241406030006869666848768] |