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A015118 as a simple table

na(n)
01
11
21
31
4-7
51
61
757
857
91
101
11-455
123705
13-455
141
151
163641
17236665
18236665
193641
201
211
22-29127
2315150201
24-120935815
2515150201
26-29127
271
281
29233017
30969583737
3161934287481
3261934287481
33969583737
34233017
351
361
37-1864135
3862053592185

[1,1,1,1,-7,1,1,57,57,1,1,-455,3705,-455,1,1,3641,
 236665,236665,3641,1,1,-29127,15150201,-120935815,
 15150201,-29127,1,1,233017,969583737,61934287481,
 61934287481,969583737,233017,1,1,-1864135,
 62053592185]