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A263980 as a simple table

na(n)
12
213
341
461
5113
6181
7269
8313
9421
10613
11761
12929
131013
141201
151301
161637
171741
181861
192113
202381
212521
222969
233121
243449
253613
264153
274337
284513
295101
305737
315953
326173
336389
346857
357321
367817
378069
388581
399397
409661
419941
4210513
4311717
4412329
4512641
4613613
4714281
4814621
4915313
5016381
5117117
5217489
5318253
5418637
5519013
5619801
5720201

[2,13,41,61,113,181,269,313,421,613,761,929,1013,
 1201,1301,1637,1741,1861,2113,2381,2521,2969,3121,
 3449,3613,4153,4337,4513,5101,5737,5953,6173,6389,
 6857,7321,7817,8069,8581,9397,9661,9941,10513,
 11717,12329,12641,13613,14281,14621,15313,16381,
 17117,17489,18253,18637,19013,19801,20201]