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Reminder: The OEIS is hiring a new managing editor, and the application deadline is January 26.
| n | a(n) |
|---|---|
| 0 | 0 |
| 1 | 1 |
| 2 | 2 |
| 3 | 4 |
| 4 | 4 |
| 5 | -4 |
| 6 | -42 |
| 7 | -104 |
| 8 | 8 |
| 9 | 1360 |
| 10 | 5354 |
| 11 | 1024 |
| 12 | -99956 |
| 13 | -494272 |
| 14 | 22974 |
| 15 | 13790848 |
| 16 | 72550928 |
| 17 | -68726528 |
| 18 | -3076799278 |
| 19 | -15167771648 |
| 20 | 44239291156 |
| 21 | 993154165760 |
| 22 | 4012843624614 |
| 23 | -28626523621376 |
| 24 | -426360266016232 |
| 25 | -1093475947065344 |
[0,1,2,4,4,-4,-42,-104,8,1360,5354,1024,-99956, -494272,22974,13790848,72550928,-68726528, -3076799278,-15167771648,44239291156,993154165760, 4012843624614,-28626523621376,-426360266016232, -1093475947065344] |