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A331247 as a simple table

na(n)
11
21
31
41
51
69
71
81
911
101
111
1213
131
143
151
1625
178
181
1915
201
211
2229
231
2417
253
261
271
283
2919
301
3111
3249
331
342
351
363
3721
3810
391
4037
4125
421
439
441
4523
4655
471
483
4941
501
5111
521
5325
542
551
5661
575
5881
5927
6015
6127
621
631
643
654
661
6729
685
6967
701
711
7249
732
7489
751
7611
7731
783

[1,1,1,1,1,9,1,1,11,1,1,13,1,3,1,25,8,1,15,1,1,29,
 1,17,3,1,1,3,19,1,11,49,1,2,1,3,21,10,1,37,25,1,9,
 1,23,55,1,3,41,1,11,1,25,2,1,61,5,81,27,15,27,1,1,
 3,4,1,29,5,67,1,1,49,2,89,1,11,31,3]