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 | -1 |
| 2 | -1 |
| 3 | 1 |
| 4 | -1 |
| 5 | -1 |
| 6 | -1 |
| 7 | -1 |
| 8 | -1 |
| 9 | -1 |
| 10 | -1 |
| 11 | 1 |
| 12 | 1 |
| 13 | -1 |
| 14 | 4 |
| 15 | 9 |
| 16 | 0 |
| 17 | 228 |
| 18 | 63 |
| 19 | 1241 |
| 20 | 69 |
| 21 | 7609 |
| 22 | 2944 |
| 23 | 11356 |
| 24 | 255 |
| 25 | 28487 |
| 26 | 30890 |
| 27 | 42037 |
| 28 | 24160 |
| 29 | 104333 |
| 30 | 19167 |
| 31 | 132196 |
| 32 | 25361 |
| 33 | 1042145 |
| 34 | 473564 |
| 35 | 4512243 |
| 36 | 153187 |
| 37 | 258856349 |
| 38 | 2950249 |
| 39 | 353554884 |
| 40 | 104435283 |
| 41 | 26762321451 |
| 42 | 2005002052 |
[-1,-1,1,-1,-1,-1,-1,-1,-1,-1,1,1,-1,4,9,0,228,63, 1241,69,7609,2944,11356,255,28487,30890,42037, 24160,104333,19167,132196,25361,1042145,473564, 4512243,153187,258856349,2950249,353554884, 104435283,26762321451,2005002052] |