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A206246 as a simple table

na(n)
11
23
37
413
521
631
743
891
9111
10183
11211
12241
13273
14381
15421
16553
17601
18651
19703
201261
211333
221561
231641
242863
252971
263081
273193
284291
294423
305403
315551
326973
337141
348011
358191
368743
378931
3811991
3912211
4013341
4113573
4214281
4314521
4415253
4515501
4615751
4716003

[1,3,7,13,21,31,43,91,111,183,211,241,273,381,421,
 553,601,651,703,1261,1333,1561,1641,2863,2971,
 3081,3193,4291,4423,5403,5551,6973,7141,8011,8191,
 8743,8931,11991,12211,13341,13573,14281,14521,
 15253,15501,15751,16003]