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A306148 as a simple table

na(n)
03
13
21
33
459
55
643
77
8139
99
10-127
1111
1262099
1313
14-2513
1515
16278923
1717
18-16761307
1919
2013372769
2121
22-327211439
2323
2418102814403
2525
26-655076773
2727
281818961119031
2929
30-659884043593273
3131
326494995052521753
3333
34-197424183925133
3535
362015477183184289687757

[3,3,1,3,59,5,43,7,139,9,-127,11,62099,13,-2513,
 15,278923,17,-16761307,19,13372769,21,-327211439,
 23,18102814403,25,-655076773,27,1818961119031,29,
 -659884043593273,31,6494995052521753,33,
 -197424183925133,35,2015477183184289687757]