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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 |
| 0 | -6 |
| 1 | 134 |
| 2 | 760 |
| 3 | 3345 |
| 4 | 12256 |
| 5 | 39350 |
| 6 | 114096 |
| 7 | 307060 |
| 8 | 776000 |
| 9 | 1867170 |
| 10 | 4298600 |
| 11 | 9540169 |
| 12 | 20487360 |
| 13 | 42756520 |
| 14 | 86967184 |
| 15 | 172859325 |
| 16 | 336450560 |
| 17 | 642489660 |
| 18 | 1205572920 |
| 19 | 2226005750 |
| 20 | 4049168800 |
| 21 | 7264172196 |
| 22 | 12864273920 |
| 23 | 22507811570 |
| 24 | 38936117376 |
| 25 | 66640520250 |
[1,-6,134,760,3345,12256,39350,114096,307060, 776000,1867170,4298600,9540169,20487360,42756520, 86967184,172859325,336450560,642489660,1205572920, 2226005750,4049168800,7264172196,12864273920, 22507811570,38936117376,66640520250] |