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A331337 as a simple table

na(n)
11
21
37
41
511
625
715
817
9-11
10241
11-87
12217
13-467
14645
15707
16-159
1735
18-1451
194067
20-9679
2117661
22-19755
2342413
24-55615
2531061
26-59799
2728231
28147841
29-230549
30473185
31-1013017
321656385
33-2771619
343637865
35-4581335
366366313
37-5062635
38-1059971
398699659
40-22821903

[1,1,7,1,11,25,15,17,-11,241,-87,217,-467,645,707,
 -159,35,-1451,4067,-9679,17661,-19755,42413,
 -55615,31061,-59799,28231,147841,-230549,473185,
 -1013017,1656385,-2771619,3637865,-4581335,
 6366313,-5062635,-1059971,8699659,-22821903]