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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | -1 |
| 2 | -1 |
| 3 | 2 |
| 4 | 10 |
| 5 | 10 |
| 6 | -97 |
| 7 | -638 |
| 8 | -1316 |
| 9 | 9908 |
| 10 | 118713 |
| 11 | 560533 |
| 12 | -697429 |
| 13 | -38229322 |
| 14 | -364288567 |
| 15 | -1441996161 |
| 16 | 11586777849 |
| 17 | 281338444108 |
| 18 | 2772828770441 |
| 19 | 10249821640498 |
| 20 | -170439385810217 |
| 21 | -4104012197171264 |
| 22 | -46232949019802137 |
| 23 | -204897893603728741 |
| 24 | 3708422726478663919 |
[1,-1,-1,2,10,10,-97,-638,-1316,9908,118713, 560533,-697429,-38229322,-364288567,-1441996161, 11586777849,281338444108,2772828770441, 10249821640498,-170439385810217,-4104012197171264, -46232949019802137,-204897893603728741, 3708422726478663919] |