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A178668 as a simple table

na(n)
11
21
31
41
55
67
75
81
917
101
1123
125
135
141
1511
1619
175
185
1947
2013
2129
227
231
2411
2529
2619
275
28103
29107
3011
315
32137
3323
3413
357
3617
3743
387
3959
4013
411
4241
4371
4443
4531
4611
4717
4811
4919
5031
5167
525
53139
54283
5541
56149
5713
58313
5923
6013
6137
6213
63347
6429
6511
6671
6717
68373
697
7011
7113
72397
7317
741
75443
767
77113
7813
7931
80467
8111
825
8313
8411
85271
86181
8711
8837
897
90281
91113
92577
9317
947
9559
96593
97199
9817
99157
10013

[1,1,1,1,5,7,5,1,17,1,23,5,5,1,11,19,5,5,47,13,29,
 7,1,11,29,19,5,103,107,11,5,137,23,13,7,17,43,7,
 59,13,1,41,71,43,31,11,17,11,19,31,67,5,139,283,
 41,149,13,313,23,13,37,13,347,29,11,71,17,373,7,
 11,13,397,17,1,443,7,113,13,31,467,11,5,13,11,271,
 181,11,37,7,281,113,577,17,7,59,593,199,17,157,13]