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A066660 as a simple table

na(n)
11
22
33
43
53
65
73
84
95
105
113
127
133
145
157
165
173
188
193
207
217
225
233
249
255
265
277
287
293
3011
313
326
337
345
357
3611
373
385
397
409
413
4211
433
447
4511
465
473
4811
495
508
517
527
533
5411
557
569
577
585
593
6015
613
625
6311
647
657
6611
673
687
697
7011
713
7214
733
745
7511
767
777
7811
793
8011
819
825
833
8415
857
865
877
889
893
9017
917
927
937
945
957

[1,2,3,3,3,5,3,4,5,5,3,7,3,5,7,5,3,8,3,7,7,5,3,9,
 5,5,7,7,3,11,3,6,7,5,7,11,3,5,7,9,3,11,3,7,11,5,3,
 11,5,8,7,7,3,11,7,9,7,5,3,15,3,5,11,7,7,11,3,7,7,
 11,3,14,3,5,11,7,7,11,3,11,9,5,3,15,7,5,7,9,3,17,
 7,7,7,5,7]