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A131504 as a simple table

na(n)
11
21
33
41
53
64
71
85
97
107
111
123
134
147
156
161
173
187
1911
2011
2117
221
235
244
257
268
2717
288
291
303
317
329
3311
3417
3515
3615
371
383
394
4011
416
4217
4311
4415
4513
461
475
487
499
5017
5119
5215
5323
5425
5523
561
573
584
597
606
6117
629
6315
6413
6523
6612
671
683
6911
7011
7111
7219
7323
7419
7525
7637
7723
7835
791
805
814
829
838
8417
858
8623
8716

[1,1,3,1,3,4,1,5,7,7,1,3,4,7,6,1,3,7,11,11,17,1,5,
 4,7,8,17,8,1,3,7,9,11,17,15,15,1,3,4,11,6,17,11,
 15,13,1,5,7,9,17,19,15,23,25,23,1,3,4,7,6,17,9,15,
 13,23,12,1,3,11,11,11,19,23,19,25,37,23,35,1,5,4,
 9,8,17,8,23,16]