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A098867 as a simple table

na(n)
13
20
37
43
523
611
731
85
931
1025
1147
1223
13127
147
15127
1635
17127
1849
19127
2077
21127
2291
23127
24119
25167
2683
27223
2837
29223
30185
31233
3229
33233
3487
35233
36145
37233
38203
39263
40131
41359
42179
43383
44191
45431
4643
47431
48129
49431
50301
51431
52387
53439
5473
55439
56365
57479
58239
59503

[3,0,7,3,23,11,31,5,31,25,47,23,127,7,127,35,127,
 49,127,77,127,91,127,119,167,83,223,37,223,185,
 233,29,233,87,233,145,233,203,263,131,359,179,383,
 191,431,43,431,129,431,301,431,387,439,73,439,365,
 479,239,503]