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| n | a(n) |
|---|---|
| 0 | 0 |
| 1 | 1 |
| 2 | 2 |
| 3 | -1 |
| 4 | -11 |
| 5 | 19 |
| 6 | 201 |
| 7 | -764 |
| 8 | -7426 |
| 9 | 52137 |
| 10 | 448435 |
| 11 | -5377604 |
| 12 | -38712486 |
| 13 | 777663613 |
| 14 | 4258812299 |
| 15 | -149524753650 |
| 16 | -505685566184 |
| 17 | 36733876797025 |
| 18 | 30910872539763 |
| 19 | -11174584391207360 |
| 20 | 25170998506744790 |
| 21 | 4101787001153848461 |
| 22 | -24862093152821214653 |
| 23 | -1776483826032814964966 |
[0,1,2,-1,-11,19,201,-764,-7426,52137,448435, -5377604,-38712486,777663613,4258812299, -149524753650,-505685566184,36733876797025, 30910872539763,-11174584391207360, 25170998506744790,4101787001153848461, -24862093152821214653,-1776483826032814964966] |