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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 1 |
| 2 | -1 |
| 3 | 5 |
| 4 | -45 |
| 5 | 609 |
| 6 | -11141 |
| 7 | 257281 |
| 8 | -7170355 |
| 9 | 233936995 |
| 10 | -8744103079 |
| 11 | 368479396171 |
| 12 | -17288353555771 |
| 13 | 894005702731735 |
| 14 | -50527305282004435 |
| 15 | 3099060459670425655 |
| 16 | -205028564671300495120 |
| 17 | 14554510561318327509610 |
| 18 | -1103542106915790217739110 |
| 19 | 89009707681627448130203830 |
| 20 | -7610129271299704960998906454 |
| 21 | 687495658528174987634449288846 |
| 22 | -65438091790081511530153327883206 |
| 23 | 6545685493719560524729653911676430 |
[1,1,-1,5,-45,609,-11141,257281,-7170355, 233936995,-8744103079,368479396171, -17288353555771,894005702731735, -50527305282004435,3099060459670425655, -205028564671300495120,14554510561318327509610, -1103542106915790217739110, 89009707681627448130203830, -7610129271299704960998906454, 687495658528174987634449288846, -65438091790081511530153327883206, 6545685493719560524729653911676430] |