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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 0 |
| 2 | -4 |
| 3 | -14 |
| 4 | -36 |
| 5 | -66 |
| 6 | -32 |
| 7 | 406 |
| 8 | 2332 |
| 9 | 8046 |
| 10 | 18472 |
| 11 | 13558 |
| 12 | -127580 |
| 13 | -848722 |
| 14 | -3236272 |
| 15 | -8208026 |
| 16 | -8089908 |
| 17 | 51660014 |
| 18 | 389206456 |
| 19 | 1588065494 |
| 20 | 4318743220 |
| 21 | 5225603310 |
| 22 | -23415860512 |
| 23 | -200117753530 |
| 24 | -863731324836 |
| 25 | -2486101104594 |
| 26 | -3511206832184 |
| 27 | 11171231626806 |
| 28 | 110034261679044 |
| 29 | 500062779185198 |
[1,0,-4,-14,-36,-66,-32,406,2332,8046,18472,13558, -127580,-848722,-3236272,-8208026,-8089908, 51660014,389206456,1588065494,4318743220, 5225603310,-23415860512,-200117753530, -863731324836,-2486101104594,-3511206832184, 11171231626806,110034261679044,500062779185198] |