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A177878 as a simple table

na(n)
01
12
20
33
41
52
64
72
84
90
105
113
126
132
143
156
164
178
184
196
200
217
225
2310
246
259
263
274
288
296
3012
318
3212
336
348
350
369
377
3814
3910
4015
419
4212
434
445
4510
468
4716
4812
4918
5012
5116
528
5310
540
5511
569
5718
5814
5921
6015
6120
6212
6315
645
656
6612
6710
6820
6916
7024
7118
7224
7316
7420
7510
7612
770

[1,2,0,3,1,2,4,2,4,0,5,3,6,2,3,6,4,8,4,6,0,7,5,10,
 6,9,3,4,8,6,12,8,12,6,8,0,9,7,14,10,15,9,12,4,5,
 10,8,16,12,18,12,16,8,10,0,11,9,18,14,21,15,20,12,
 15,5,6,12,10,20,16,24,18,24,16,20,10,12,0]