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| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 4 |
| 3 | -4 |
| 4 | 1 |
| 5 | 81 |
| 6 | -108 |
| 7 | 54 |
| 8 | -12 |
| 9 | 1 |
| 10 | 15625 |
| 11 | -18750 |
| 12 | 9375 |
| 13 | -2500 |
| 14 | 375 |
| 15 | -30 |
| 16 | 1 |
| 17 | 5764801 |
| 18 | -6588344 |
| 19 | 3294172 |
| 20 | -941192 |
| 21 | 168070 |
| 22 | -19208 |
| 23 | 1372 |
| 24 | -56 |
| 25 | 1 |
| 26 | 25937424601 |
| 27 | -23579476910 |
| 28 | 9646149645 |
| 29 | -2338460520 |
| 30 | 372027810 |
| 31 | -40584852 |
| 32 | 3074610 |
| 33 | -159720 |
| 34 | 5445 |
| 35 | -110 |
| 36 | 1 |
| 37 | 23298085122481 |
| 38 | -21505924728444 |
[1,4,-4,1,81,-108,54,-12,1,15625,-18750,9375, -2500,375,-30,1,5764801,-6588344,3294172,-941192, 168070,-19208,1372,-56,1,25937424601,-23579476910, 9646149645,-2338460520,372027810,-40584852, 3074610,-159720,5445,-110,1,23298085122481, -21505924728444] |