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A209421 as a simple table

na(n)
11
21
31
43
51
61
75
84
91
101
119
127
135
141
151
1615
1715
189
196
201
211
2225
2328
2422
2511
267
271
281
2941
3053
3144
3230
3313
348
351
361
3767
3897
3991
4063
4139
4215
439
441
451
46109
47176
48179
49140
5085
5149
5217
5310
541
551
56177
57315
58349
59291
60201
61110
6260
6319
6411
651
661
67287
68559
69667
70601
71437
72275
73138
7472
7521
7612
771
781

[1,1,1,3,1,1,5,4,1,1,9,7,5,1,1,15,15,9,6,1,1,25,
 28,22,11,7,1,1,41,53,44,30,13,8,1,1,67,97,91,63,
 39,15,9,1,1,109,176,179,140,85,49,17,10,1,1,177,
 315,349,291,201,110,60,19,11,1,1,287,559,667,601,
 437,275,138,72,21,12,1,1]