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A160464 as a simple table

na(n)
2-1
3-11
42
5-114
629
7-2
8-3963
91156
10-122
114
12-104745
1332863
14-4206
15222
16-4
17-3926745
181287813
19-184279
2012198
21-366
224
23-198491580
2467029582
25-10317484
26781981
27-30132
28562
29-4

[-1,-11,2,-114,29,-2,-3963,1156,-122,4,-104745,
 32863,-4206,222,-4,-3926745,1287813,-184279,12198,
 -366,4,-198491580,67029582,-10317484,781981,
 -30132,562,-4]