The OEIS is supported by the many generous donors to the OEIS Foundation.
| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 0 |
| 2 | 1 |
| 3 | 1 |
| 4 | 2 |
| 5 | 2 |
| 6 | 4 |
| 7 | 3 |
| 8 | 5 |
| 9 | 5 |
| 10 | 7 |
| 11 | 6 |
| 12 | 9 |
| 13 | 6 |
| 14 | 8 |
| 15 | 5 |
| 16 | 5 |
| 17 | -1 |
| 18 | -2 |
| 19 | -13 |
| 20 | -18 |
| 21 | -33 |
| 22 | -45 |
| 23 | -68 |
| 24 | -86 |
| 25 | -121 |
| 26 | -151 |
| 27 | -198 |
| 28 | -244 |
| 29 | -310 |
| 30 | -373 |
| 31 | -464 |
| 32 | -553 |
| 33 | -671 |
| 34 | -793 |
| 35 | -948 |
| 36 | -1107 |
| 37 | -1309 |
| 38 | -1517 |
| 39 | -1771 |
| 40 | -2039 |
| 41 | -2360 |
| 42 | -2696 |
| 43 | -3098 |
| 44 | -3519 |
| 45 | -4011 |
| 46 | -4534 |
| 47 | -5137 |
| 48 | -5774 |
| 49 | -6508 |
| 50 | -7283 |
| 51 | -8163 |
| 52 | -9099 |
| 53 | -10153 |
| 54 | -11269 |
[1,0,1,1,2,2,4,3,5,5,7,6,9,6,8,5,5,-1,-2,-13,-18, -33,-45,-68,-86,-121,-151,-198,-244,-310,-373, -464,-553,-671,-793,-948,-1107,-1309,-1517,-1771, -2039,-2360,-2696,-3098,-3519,-4011,-4534,-5137, -5774,-6508,-7283,-8163,-9099,-10153,-11269] |