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A088837 as a simple table

na(n)
13
27
33
415
53
67
73
831
93
107
113
1215
133
147
153
1663
173
187
193
2015
213
227
233
2431
253
267
273
2815
293
307
313
32127
333
347
353
3615
373
387
393
4031
413
427
433
4415
453
467
473
4863
493
507
513
5215
533
547
553
5631
573
587
593
6015
613
627
633
64255
653
667
673
6815
693
707
713
7231
733
747
753
7615
773
787
793
8063
813
827
833
8415
853
867
873
8831
893
907
913
9215
933

[3,7,3,15,3,7,3,31,3,7,3,15,3,7,3,63,3,7,3,15,3,7,
 3,31,3,7,3,15,3,7,3,127,3,7,3,15,3,7,3,31,3,7,3,
 15,3,7,3,63,3,7,3,15,3,7,3,31,3,7,3,15,3,7,3,255,
 3,7,3,15,3,7,3,31,3,7,3,15,3,7,3,63,3,7,3,15,3,7,
 3,31,3,7,3,15,3]