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A319218 as a simple table

na(n)
01
1-1
2-2
33
48
575
6-216
7-175
8-3816
9-36225
10189800
11325149
122375460
1325547951
14386162126
15-3290670825
16-6316583056
17-59290501809
18-310987223208
19-4836373835707
20-86500419684420
211119358992256239
223043733432729198
2326408738842522959
24169835931388147464

[1,-1,-2,3,8,75,-216,-175,-3816,-36225,189800,
 325149,2375460,25547951,386162126,-3290670825,
 -6316583056,-59290501809,-310987223208,
 -4836373835707,-86500419684420,1119358992256239,
 3043733432729198,26408738842522959,
 169835931388147464]