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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | -1 |
| 2 | -9 |
| 3 | 69 |
| 4 | 321 |
| 5 | 160839 |
| 6 | 1416951 |
| 7 | -388946691 |
| 8 | 25514578881 |
| 9 | -7647989401521 |
| 10 | -1013917176434889 |
| 11 | -155812911328032651 |
| 12 | 58581931023896704641 |
| 13 | -5858755019306243919081 |
| 14 | -408029640141643683923529 |
| 15 | 1792307462194161463885110189 |
| 16 | 320024081648207578976876009601 |
[1,-1,-9,69,321,160839,1416951,-388946691, 25514578881,-7647989401521,-1013917176434889, -155812911328032651,58581931023896704641, -5858755019306243919081,-408029640141643683923529, 1792307462194161463885110189, 320024081648207578976876009601] |