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A007897 as a simple table

na(n)
11
21
32
42
53
62
74
84
94
103
116
124
137
144
156
166
179
184
1910
206
218
226
2312
248
2511
267
2710
288
2915
306
3116
3210
3312
349
3512
368
3719
3810
3914
4012
4121
428
4322
4412
4512
4612
4724
4812
4922
5011
5118
5214
5327
5410
5518
5616
5720
5815
5930
6012
6131
6216
6316
6418
6521
6612
6734
6818
6924
7012
7136
7216
7337
7419
7522
7620
7724
7814
7940
8018
8128

[1,1,2,2,3,2,4,4,4,3,6,4,7,4,6,6,9,4,10,6,8,6,12,
 8,11,7,10,8,15,6,16,10,12,9,12,8,19,10,14,12,21,8,
 22,12,12,12,24,12,22,11,18,14,27,10,18,16,20,15,
 30,12,31,16,16,18,21,12,34,18,24,12,36,16,37,19,
 22,20,24,14,40,18,28]