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A138881 as a simple table

na(n)
11
21
33
41
52
63
76
81
92
105
1110
121
133
145
1515
161
173
187
1921
201
212
224
237
2414
2528
261
272
283
294
306
319
3212
3318
3436
351
363
375
389
3915
4045
411
425
4311
4455
451
462
473
486
4911
5022
5133
5266
531
542
553
566
5713
5826
5939
6078
611
627
6313
6491
651
663
675
687
6915
7021
7135
72105

[1,1,3,1,2,3,6,1,2,5,10,1,3,5,15,1,3,7,21,1,2,4,7,
 14,28,1,2,3,4,6,9,12,18,36,1,3,5,9,15,45,1,5,11,
 55,1,2,3,6,11,22,33,66,1,2,3,6,13,26,39,78,1,7,13,
 91,1,3,5,7,15,21,35,105]