The OEIS is supported by the many generous donors to the OEIS Foundation.
Reminder: The OEIS is hiring a new managing editor, and the application deadline is January 26.
Reminder: The OEIS is hiring a new managing editor, and the application deadline is January 26.
| n | a(n) |
|---|---|
| 1 | 0 |
| 2 | 1 |
| 3 | 0 |
| 4 | 4 |
| 5 | -1 |
| 6 | 9 |
| 7 | 0 |
| 8 | 17 |
| 9 | 0 |
| 10 | 21 |
| 11 | -1 |
| 12 | 36 |
| 13 | 0 |
| 14 | 50 |
| 15 | -9 |
| 16 | 68 |
| 17 | -1 |
| 18 | 81 |
| 19 | 0 |
| 20 | 85 |
| 21 | 0 |
| 22 | 117 |
| 23 | -1 |
| 24 | 153 |
| 25 | -25 |
| 26 | 170 |
| 27 | 0 |
| 28 | 200 |
| 29 | -1 |
| 30 | 189 |
| 31 | 0 |
| 32 | 273 |
| 33 | -9 |
| 34 | 285 |
| 35 | -50 |
| 36 | 324 |
| 37 | 0 |
| 38 | 362 |
| 39 | 0 |
| 40 | 365 |
| 41 | -1 |
| 42 | 450 |
| 43 | 0 |
| 44 | 469 |
| 45 | -81 |
| 46 | 525 |
| 47 | -1 |
| 48 | 612 |
| 49 | 0 |
| 50 | 526 |
| 51 | -9 |
| 52 | 680 |
| 53 | -1 |
| 54 | 729 |
| 55 | -146 |
| 56 | 850 |
| 57 | 0 |
| 58 | 837 |
| 59 | -1 |
| 60 | 765 |
| 61 | 0 |
| 62 | 962 |
| 63 | 0 |
| 64 | 1092 |
| 65 | -170 |
| 66 | 1053 |
| 67 | 0 |
| 68 | 1141 |
| 69 | -9 |
[0,1,0,4,-1,9,0,17,0,21,-1,36,0,50,-9,68,-1,81,0, 85,0,117,-1,153,-25,170,0,200,-1,189,0,273,-9,285, -50,324,0,362,0,365,-1,450,0,469,-81,525,-1,612,0, 526,-9,680,-1,729,-146,850,0,837,-1,765,0,962,0, 1092,-170,1053,0,1141,-9] |