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A208994 as a simple table

na(n)
01
11
23
35
47
511
615
719
825
931
1037
1145
1253
1361
1471
1581
1691
17103
18115
19127
20141
21155
22169
23185
24201
25217
26235
27253
28271
29291
30311
31331
32353
33375
34397
35421
36445
37469
38495
39521
40547
41575
42603
43631
44661
45691
46721
47753
48785
49817
50851
51885
52919
53955
54991
551027
561065
571103
581141

[1,1,3,5,7,11,15,19,25,31,37,45,53,61,71,81,91,
 103,115,127,141,155,169,185,201,217,235,253,271,
 291,311,331,353,375,397,421,445,469,495,521,547,
 575,603,631,661,691,721,753,785,817,851,885,919,
 955,991,1027,1065,1103,1141]