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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 1 |
| 2 | -1 |
| 3 | 1 |
| 4 | -3 |
| 5 | 2 |
| 6 | 1 |
| 7 | -7 |
| 8 | 14 |
| 9 | -8 |
| 10 | 1 |
| 11 | -15 |
| 12 | 70 |
| 13 | -120 |
| 14 | 64 |
| 15 | 1 |
| 16 | -31 |
| 17 | 310 |
| 18 | -1240 |
| 19 | 1984 |
| 20 | -1024 |
| 21 | 1 |
| 22 | -63 |
| 23 | 1302 |
| 24 | -11160 |
| 25 | 41664 |
| 26 | -64512 |
| 27 | 32768 |
| 28 | 1 |
| 29 | -127 |
| 30 | 5334 |
| 31 | -94488 |
| 32 | 755904 |
| 33 | -2731008 |
| 34 | 4161536 |
| 35 | -2097152 |
| 36 | 1 |
| 37 | -255 |
| 38 | 21590 |
| 39 | -777240 |
| 40 | 12850368 |
| 41 | -99486720 |
| 42 | 353730560 |
[1,1,-1,1,-3,2,1,-7,14,-8,1,-15,70,-120,64,1,-31, 310,-1240,1984,-1024,1,-63,1302,-11160,41664, -64512,32768,1,-127,5334,-94488,755904,-2731008, 4161536,-2097152,1,-255,21590,-777240,12850368, -99486720,353730560] |