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A067881 as a simple table

na(n)
11
21
31
41
52
65
70
84
92
105
1110
128
131
145
156
168
175
1813
1918
200
217
2220
239
246
2514
262
277
287
2918
3011
310
3212
3320
3410
3531
3628
3727
3834
3929
4018
4113
428
4328
4414
459
4612
4739
485
4915
508
515
520
537
5421
5554
5613
5716
5820
5924
6018
6112
6214
636
6453
6521
6642
6747
6814
6946
7014
7142
7271
7341
7463
7524
7628
7732
7861
7935

[1,1,1,1,2,5,0,4,2,5,10,8,1,5,6,8,5,13,18,0,7,20,
 9,6,14,2,7,7,18,11,0,12,20,10,31,28,27,34,29,18,
 13,8,28,14,9,12,39,5,15,8,5,0,7,21,54,13,16,20,24,
 18,12,14,6,53,21,42,47,14,46,14,42,71,41,63,24,28,
 32,61,35]