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A238196 as a simple table

na(n)
15
2-31
3-23
4-283
5-400
6-283
73381
83017
93233
102869
1149781
1261504
1391125
1433856
1549781
16-870199
17-811043
18-830455
19-816631
20-836043
21-776887
22-17600759
23-20502784
24-16861591
25-40960000
26-16861591
27-20502784
28-17600759
29404197705
30384126317
31586376253

[5,-31,-23,-283,-400,-283,3381,3017,3233,2869,
 49781,61504,91125,33856,49781,-870199,-811043,
 -830455,-816631,-836043,-776887,-17600759,
 -20502784,-16861591,-40960000,-16861591,-20502784,
 -17600759,404197705,384126317,586376253]