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A278493 as a simple table

na(n)
01
11
22
31
43
53
61
73
85
94
101
113
127
137
145
151
163
177
189
199
206
211
223
237
2413
2513
2611
277
281
293
307
3113
3215
3315
3413
358
361
373
387
3913
4019
4119
4219
4315
449
451
463
477
4813
4919
5025
5125
5221
5317
5410
551
563
577
5813
5919
6027
6127
6227
6325
6419
6511
661
673
687
6913
7019
7127
7231
7331
7431
7527
7621
7712
781
793
807
8113
8219
8327
8439
8539
8639
8737
8831
8923
9013

[1,1,2,1,3,3,1,3,5,4,1,3,7,7,5,1,3,7,9,9,6,1,3,7,
 13,13,11,7,1,3,7,13,15,15,13,8,1,3,7,13,19,19,19,
 15,9,1,3,7,13,19,25,25,21,17,10,1,3,7,13,19,27,27,
 27,25,19,11,1,3,7,13,19,27,31,31,31,27,21,12,1,3,
 7,13,19,27,39,39,39,37,31,23,13]