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A064101 as a simple table

na(n)
15
27
319
431
597
6131
7151
8293
9587
10683
11811
12839
13857
14907
151013
161097
171279
182347
192677
202833
213011
223329
234217
244219
255441
265839
275849
286113
298233
308273
318963
329433
3310301
3410427
3510859
3611953
3713513
3813597
3913721
4013931
4114713
4215629
4316057

[5,7,19,31,97,131,151,293,587,683,811,839,857,907,
 1013,1097,1279,2347,2677,2833,3011,3329,4217,4219,
 5441,5839,5849,6113,8233,8273,8963,9433,10301,
 10427,10859,11953,13513,13597,13721,13931,14713,
 15629,16057]