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A048977 as a simple table

na(n)
13
27
313
419
531
661
7127
8127
9331
10307
11307
12631
131801
141723
153169
161093
171723
183571
191093
203221
215419
223541
233541
248269
255113
265113
2713267
288011
298011
3016651
3110303
3219441
3310303
3424571
3517293
3617293
3728057
3830103
3955897
4028057
4159221
4230103
438191
4419531

[3,7,13,19,31,61,127,127,331,307,307,631,1801,
 1723,3169,1093,1723,3571,1093,3221,5419,3541,3541,
 8269,5113,5113,13267,8011,8011,16651,10303,19441,
 10303,24571,17293,17293,28057,30103,55897,28057,
 59221,30103,8191,19531]