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A003960 as a simple table

na(n)
11
21
32
41
53
62
74
81
94
103
116
122
137
144
156
161
179
184
1910
203
218
226
2312
242
259
267
278
284
2915
306
3116
321
3312
349
3512
364
3719
3810
3914
403
4121
428
4322
446
4512
4612
4724
482
4916
509
5118
527
5327
548
5518
564
5720
5815
5930
606
6131
6216
6316
641
6521
6612
6734
689
6924
7012
7136
724
7337
7419
7518
7610
7724
7814
7940
803
8116
8221
8342
848
8527

[1,1,2,1,3,2,4,1,4,3,6,2,7,4,6,1,9,4,10,3,8,6,12,
 2,9,7,8,4,15,6,16,1,12,9,12,4,19,10,14,3,21,8,22,
 6,12,12,24,2,16,9,18,7,27,8,18,4,20,15,30,6,31,16,
 16,1,21,12,34,9,24,12,36,4,37,19,18,10,24,14,40,3,
 16,21,42,8,27]