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A264527 as a simple table

na(n)
21
31
45
57
67
79
813
913
1017
1119
1219
1321
1425
1523
1629
1727
1831
1935
2033
2137
2239
2343
2441
2547
2649
2749
2853
2955
3053
3151
3245
3361
3463
3567
3667
3763
3873
3973
4077
4175
4279
4381
4485
4583
4689
4787
4885
4995
5097
5197
5293
5393
54103
5587
5699
57109
58113
59115
60113
61119
62117
63115
64123
65127

[1,1,5,7,7,9,13,13,17,19,19,21,25,23,29,27,31,35,
 33,37,39,43,41,47,49,49,53,55,53,51,45,61,63,67,
 67,63,73,73,77,75,79,81,85,83,89,87,85,95,97,97,
 93,93,103,87,99,109,113,115,113,119,117,115,123,
 127]