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A184726 as a simple table

na(n)
10
20
31
41
51
63
71
81
95
101
111
127
131
145
159
161
171
1811
197
201
2113
221
231
2415
251
267
2717
281
2911
3019
311
321
3321
3413
351
3623
371
381
3925
4011
411
4227
431
4417
4529
461
4713
4831
4919
501
5133
521
531
5435
551
561
5737
581
5923
6039
6117
6211
6341
6425
651
6643
671
6819
6945
701
711
7247

[0,0,1,1,1,3,1,1,5,1,1,7,1,5,9,1,1,11,7,1,13,1,1,
 15,1,7,17,1,11,19,1,1,21,13,1,23,1,1,25,11,1,27,1,
 17,29,1,13,31,19,1,33,1,1,35,1,1,37,1,23,39,17,11,
 41,25,1,43,1,19,45,1,1,47]