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A139259 as a simple table

na(n)
15
25
35
45
57
65
75
87
97
105
115
127
137
147
155
165
177
187
197
207
215
225
237
247
252
267
277
285
295
307
317
322
332
347
357
365
375
387
397
402
411
422
437
447
455
465
477
487
492
501
511
522
537
547
555
565
577
587
592
601
615
621
632
647
657
665
675
687
697
702
711
725
735
741
752
767
777
785

[5,5,5,5,7,5,5,7,7,5,5,7,7,7,5,5,7,7,7,7,5,5,7,7,
 2,7,7,5,5,7,7,2,2,7,7,5,5,7,7,2,1,2,7,7,5,5,7,7,2,
 1,1,2,7,7,5,5,7,7,2,1,5,1,2,7,7,5,5,7,7,2,1,5,5,1,
 2,7,7,5]