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A266970 as a simple table

na(n)
13
211
331
441
5103
6131
7167
8223
9503
10521
11563
12601
13677
14739
15829
16911
171361
181439
191511
201613
211741
221913
231931
242441
252939
263191
273391
283413
293499
303671
313823
324007
334229
344871
354931
364969
375231
385851
396047
406301
416329
427079
437331
447523
457759
468087
478263
488543
499281
509283

[3,11,31,41,103,131,167,223,503,521,563,601,677,
 739,829,911,1361,1439,1511,1613,1741,1913,1931,
 2441,2939,3191,3391,3413,3499,3671,3823,4007,4229,
 4871,4931,4969,5231,5851,6047,6301,6329,7079,7331,
 7523,7759,8087,8263,8543,9281,9283]