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| n | a(n) |
|---|---|
| 1 | -1 |
| 2 | 0 |
| 3 | -3 |
| 4 | 4 |
| 5 | -5 |
| 6 | 6 |
| 7 | -7 |
| 8 | 16 |
| 9 | -18 |
| 10 | 20 |
| 11 | -22 |
| 12 | 36 |
| 13 | -39 |
| 14 | 42 |
| 15 | -60 |
| 16 | 80 |
| 17 | -85 |
| 18 | 90 |
| 19 | -114 |
| 20 | 140 |
| 21 | -168 |
| 22 | 176 |
| 23 | -207 |
| 24 | 264 |
| 25 | -300 |
| 26 | 312 |
| 27 | -378 |
| 28 | 448 |
| 29 | -493 |
| 30 | 540 |
| 31 | -620 |
| 32 | 736 |
| 33 | -825 |
| 34 | 884 |
| 35 | -1015 |
| 36 | 1188 |
| 37 | -1295 |
| 38 | 1406 |
| 39 | -1599 |
| 40 | 1840 |
| 41 | -2009 |
| 42 | 2184 |
| 43 | -2451 |
| 44 | 2772 |
| 45 | -3060 |
| 46 | 3312 |
| 47 | -3666 |
| 48 | 4176 |
| 49 | -4557 |
[-1,0,-3,4,-5,6,-7,16,-18,20,-22,36,-39,42,-60,80, -85,90,-114,140,-168,176,-207,264,-300,312,-378, 448,-493,540,-620,736,-825,884,-1015,1188,-1295, 1406,-1599,1840,-2009,2184,-2451,2772,-3060,3312, -3666,4176,-4557] |