The OEIS is supported by the many generous donors to the OEIS Foundation.
| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 2 |
| 2 | -1 |
| 3 | 5 |
| 4 | -2 |
| 5 | -1 |
| 6 | 10 |
| 7 | -5 |
| 8 | -2 |
| 9 | 0 |
| 10 | 20 |
| 11 | -10 |
| 12 | -5 |
| 13 | 0 |
| 14 | 0 |
| 15 | 36 |
| 16 | -20 |
| 17 | -10 |
| 18 | 0 |
| 19 | 0 |
| 20 | 1 |
| 21 | 65 |
| 22 | -36 |
| 23 | -20 |
| 24 | 0 |
| 25 | 0 |
| 26 | 2 |
| 27 | 0 |
| 28 | 1 |
| 29 | 1 |
| 30 | 0 |
| 31 | 110 |
| 32 | -65 |
| 33 | -36 |
| 34 | 0 |
| 35 | 0 |
| 36 | 5 |
| 37 | 0 |
| 38 | 1 |
| 39 | 185 |
| 40 | -110 |
| 41 | -65 |
| 42 | 0 |
| 43 | 0 |
| 44 | 110 |
| 45 | 0 |
| 46 | 2 |
| 47 | 0 |
| 48 | 300 |
| 49 | -185 |
| 50 | -110 |
| 51 | 0 |
| 52 | 0 |
| 53 | 20 |
| 54 | 0 |
| 55 | 5 |
| 56 | 0 |
| 57 | 0 |
[1,2,-1,5,-2,-1,10,-5,-2,0,20,-10,-5,0,0,36,-20, -10,0,0,1,65,-36,-20,0,0,2,0,1,1,0,110,-65,-36,0, 0,5,0,1,185,-110,-65,0,0,110,0,2,0,300,-185,-110, 0,0,20,0,5,0,0] |