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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | -1 |
| 2 | -1 |
| 3 | -11 |
| 4 | -95 |
| 5 | -1321 |
| 6 | -22561 |
| 7 | -474851 |
| 8 | -11785535 |
| 9 | -337650001 |
| 10 | -10962505921 |
| 11 | -397804232891 |
| 12 | -15954963362975 |
| 13 | -700861670953081 |
| 14 | -33464274136282081 |
| 15 | -1725656338796874131 |
| 16 | -95578727098089100415 |
| 17 | -5658893822397686566561 |
| 18 | -356659432609686011399041 |
| 19 | -23841281202421071709150571 |
[1,-1,-1,-11,-95,-1321,-22561,-474851,-11785535, -337650001,-10962505921,-397804232891, -15954963362975,-700861670953081, -33464274136282081,-1725656338796874131, -95578727098089100415,-5658893822397686566561, -356659432609686011399041, -23841281202421071709150571] |