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A228409 as a simple table

na(n)
19
21
31
45
51
69
71
85
95
109
111
125
131
149
159
165
171
185
191
205
219
229
231
245
255
269
275
285
291
301
311
325
339
349
359
365
371
389
399
405
411
421
431
445
455
469
471
485
495
505
519
525
531
545
559
565
579
589
591
605
611
629
635
645
659
661
671
685
699
701
711
725
731
749
755
765
779
781
791
805
815
829
831
845
859
869
879

[9,1,1,5,1,9,1,5,5,9,1,5,1,9,9,5,1,5,1,5,9,9,1,5,
 5,9,5,5,1,1,1,5,9,9,9,5,1,9,9,5,1,1,1,5,5,9,1,5,5,
 5,9,5,1,5,9,5,9,9,1,5,1,9,5,5,9,1,1,5,9,1,1,5,1,9,
 5,5,9,1,1,5,5,9,1,5,9,9,9]