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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 21 |
| 2 | -666 |
| 3 | -34048 |
| 4 | -655335 |
| 5 | -7427988 |
| 6 | -55630666 |
| 7 | -290463138 |
| 8 | -1104081822 |
| 9 | -3239870284 |
| 10 | -7842842112 |
| 11 | -15742299384 |
| 12 | -24417702377 |
| 13 | -30080972403 |
| 14 | -28964466882 |
| 15 | 22837159352 |
| 16 | 121791163356 |
| 17 | 164707345152 |
| 18 | 491149796174 |
| 19 | 668773471470 |
| 20 | 222330211434 |
| 21 | 722181385964 |
| 22 | 715812714486 |
[1,21,-666,-34048,-655335,-7427988,-55630666, -290463138,-1104081822,-3239870284,-7842842112, -15742299384,-24417702377,-30080972403, -28964466882,22837159352,121791163356, 164707345152,491149796174,668773471470, 222330211434,722181385964,715812714486] |