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) |
|---|---|
| 0 | 1 |
| 1 | 0 |
| 2 | -2 |
| 3 | -7 |
| 4 | -21 |
| 5 | -63 |
| 6 | -195 |
| 7 | -624 |
| 8 | -2054 |
| 9 | -6916 |
| 10 | -23712 |
| 11 | -82498 |
| 12 | -290510 |
| 13 | -1033410 |
| 14 | -3707850 |
| 15 | -13402695 |
| 16 | -48760365 |
| 17 | -178405155 |
| 18 | -656043855 |
| 19 | -2423307045 |
| 20 | -8987427465 |
| 21 | -33453694485 |
| 22 | -124936258125 |
| 23 | -467995871775 |
| 24 | -1757900019099 |
| 25 | -6619846420551 |
| 26 | -24987199492703 |
[1,0,-2,-7,-21,-63,-195,-624,-2054,-6916,-23712, -82498,-290510,-1033410,-3707850,-13402695, -48760365,-178405155,-656043855,-2423307045, -8987427465,-33453694485,-124936258125, -467995871775,-1757900019099,-6619846420551, -24987199492703] |