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Reminder: The OEIS is hiring a new managing editor, and the application deadline is January 26.
| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 1 |
| 3 | -2 |
| 4 | 5 |
| 5 | 13 |
| 6 | 24 |
| 7 | -229 |
| 8 | -365 |
| 9 | 7394 |
| 10 | -59449 |
| 11 | -572233 |
| 12 | -7773360 |
| 13 | 151071097 |
| 14 | -578687351 |
| 15 | -87627413666 |
| 16 | 1616831255645 |
| 17 | 95461592201461 |
| 18 | 5420484489890376 |
| 19 | -308006807300556157 |
| 20 | 18159275356643111275 |
| 21 | 3018684797307268036418 |
[1,1,-2,5,13,24,-229,-365,7394,-59449,-572233, -7773360,151071097,-578687351,-87627413666, 1616831255645,95461592201461,5420484489890376, -308006807300556157,18159275356643111275, 3018684797307268036418] |