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A177904 as a simple table

na(n)
11
21
31
43
55
63
711
819
911
1041
1171
1241
1317
1443
15101
1623
17167
1897
1941
2061
21199
2243
23101
247
25151
2637
2713
2867
2913
3031
3137
323
3371
3437
3537
3629
37103
3813
3929
4029
4171
4243
4313
44127
4561
4667
4717
4829
49113
5053
5113
52179
537
54199
5511
5631
57241
58283
5937
6017
61337
6223
6329
64389
657
6617
6759
6883
6953
7013
71149
7243
7341
74233
75317
76197
7783
78199
79479
80761
811439
8247
83107

[1,1,1,3,5,3,11,19,11,41,71,41,17,43,101,23,167,
 97,41,61,199,43,101,7,151,37,13,67,13,31,37,3,71,
 37,37,29,103,13,29,29,71,43,13,127,61,67,17,29,
 113,53,13,179,7,199,11,31,241,283,37,17,337,23,29,
 389,7,17,59,83,53,13,149,43,41,233,317,197,83,199,
 479,761,1439,47,107]