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A118561 as a simple table

na(n)
11
23
37
49
513
615
731
833
937
1051
1173
1299
13111
14115
15133
16141
17151
18163
19169
20171
21189
22193
23195
24303
25327
26331
27339
28361
29385
30391
31393
32399
33511
34529
35535
36537
37579
38583
39591
40717
41723
42727
43729
44735
45739
46777
47787
48925
49927
50933
51937
52961
53975
54979
55981
56993

[1,3,7,9,13,15,31,33,37,51,73,99,111,115,133,141,
 151,163,169,171,189,193,195,303,327,331,339,361,
 385,391,393,399,511,529,535,537,579,583,591,717,
 723,727,729,735,739,777,787,925,927,933,937,961,
 975,979,981,993]